Paris prosecutor says Bastille Day killer had help preparing attack

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Five people to appear in French court over links to Nice attacker

The Tunisian man who killed 84 people on the French Riviera by plowing his truck into Bastille Day crowds had been planning the attack for months with the help of at least five accomplices, the Paris prosecutor said on Thursday.

"The investigation under way since the night of July 14 has progressed and not only confirmed the murderous premeditated nature of Mohamed Lahouaiej Bouhlel's act but also established that he benefited from support and complicity," Francois Molins told a news conference.

Images of vigils around the world for the Nice attack victims

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Vigils around the world for the Nice attack victims
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Vigils around the world for the Nice attack victims
Members of the Australian French community place candles during a vigil in central Sydney, Australia, July 15, 2016 to remember the victims of the Bastille Day truck attack in Nice. REUTERS/David Gray
Members of the Australian French community place candles during a vigil in central Sydney, Australia, July 15, 2016, to remember the victims of the Bastille Day truck attack in Nice. REUTERS/David Gray
Members of the Australian French community place candles during a vigil in central Sydney, Australia, July 15, 2016 to remember the victims of the Bastille Day truck attack in Nice. REUTERS/David Gray
School children offer prayers to pay tribute to the victims of the Bastille Day truck attack in Nice, at a school in Ahmedabad, India, July 15, 2016. REUTERS/Amit Dave
Members of the Australian French community cry as they sing the French national anthem during a vigil in central Sydney, Australia, July 15, 2016 to remember the victims of the Bastille Day truck attack in Nice. REUTERS/David Gray
BANGKOK, THAILAND - JULY 15: French ambassador to Thailand Gilles Garachonk (4th R) joins a vigil to remember the victims of the attack in the French city of Nice at the Alliance Francaise, on July 15, in Bangkok, Thailand. A French-Tunisian attacker killed 84 people as he drove a lorry through crowds, gathered to watch a firework display during Bastille Day celebrations. The attacker then opened fire on people in the crowd before being shot dead by police. (Photo by Dario Pignatelli/Getty Images)
Indian citizens take part in a candle light vigil for the victims of the Mumbai attacks in New Delhi on December 7, 2008.India accuses the banned Islamist movement Laskhar-e-Taiba of training and equipping the 10 militants who stormed India's financial capital by boat to kill 188 people and leaving more than 300 others injured during the 60-hour orgy of violence that saw two luxury hotels and a number of other sites targeted. AFP PHOTO/ Manpreet ROMANA (Photo credit should read MANPREET ROMANA/AFP/Getty Images)
In the courtyard of the apt. building where killer, Maj. Nidal Malik Hasan, lived, (LÂR) Kolleen Alldridge, hugs her son, Gavyn Alldridge, 4, while apartment complex manager, Alice Thompson, huddles close to her friend during a candle light vigil where neighbors are trying to come to terms with the shooting, in Killeen, Texas November 07, 09. THe neighbors all said what a nice person Mr Hasan was. (Photo by Barbara Davidson/Los Angeles Times via Getty Images)
A boy lays a candles to form a heart around a bag reading 'Nice Olympic Swimming' during a candlelight vigil for swimming gold medallist Camille Muffat on March 10, 2015 her hometown, the southeastern French city of Nice, after she died along with nine other people in a helicopter crash in Argentina while filming a reality TV show. France was plunged into mourning on March 10 after three well-known sports stars, including the Olympic champion swimmer and one of the world's best sailors, died when two helicopters filming the survival series 'Dropped' smashed into each other in the rugged mountains of La Rioja province, local officials said. AFP PHOTO / VALERY HACHE (Photo credit should read VALERY HACHE/AFP/Getty Images)
A hand holds a candle and a French flag above the crowd during a vigil to honor victims of the Bastille Day attack, in Sydney, Australia, Friday, July 15, 2016. World leaders are expressing dismay, sadness and solidarity with France over the attack carried out by a man who drove truck into crowds of people celebrating France's national day in Nice. (AP Photo/Rob Griffith)
People stand around a circle of candles during a moment of silence at a vigil to honor victims of the Bastille Day tragedy in Nice, France, in Sydney, Australia, Friday, July 15, 2016. World leaders are expressing dismay, sadness and solidarity with France over the attack carried out by a man who drove truck into crowds of people celebrating France's national day in Nice. (AP Photo/Rob Griffith)
A young woman wipes her face as people honor victims of the Bastille Day attack with a moment of silence during a vigil, in Sydney, Australia, Friday, July 15, 2016. World leaders are expressing dismay, sadness and solidarity with France over the attack carried out by a man who drove truck into crowds of people celebrating France's national day in Nice. AP Photo/Rob Griffith)
Indian school children attend a prayer ceremony in memory of victims of a truck attack in France, at a school in Ahmadabad, India, Friday, July 15, 2016. A large truck mowed through revelers gathered for Bastille Day fireworks in Nice, killing dozens of people and sending people fleeing into the sea as it bore down for more than a mile along the Riviera city's famed waterfront promenade. (AP Photo/Ajit Solanki)
Flowers are pictured near the scene where a truck mowed through revelers in Nice, southern France, Friday, July 15, 2016. A large truck mowed through revelers gathered for Bastille Day fireworks in Nice, killing more than 80 people and sending people fleeing into the sea as it bore down for more than a mile along the Riviera city's famed waterfront promenade. (AP Photo/Francois Mori)
A woman puts flowers near the scene where a truck mowed through revelers in Nice, southern France, Friday, July 15, 2016. A large truck mowed through revelers gathered for Bastille Day fireworks in Nice, killing more than 80 people and sending people fleeing into the sea as it bore down for more than a mile along the Riviera city's famed waterfront promenade. (AP Photo/Francois Mori)
People react near the scene where a truck mowed through revelers in Nice, southern France, Friday, July 15, 2016. A large truck mowed through revelers gathered for Bastille Day fireworks in Nice, killing more than 80 people and sending people fleeing into the sea as it bore down for more than a mile along the Riviera city's famed waterfront promenade. (AP Photo/Francois Mori)
A man walks through the gates of the French Embassy in Madrid, Spain, Friday, July 15, 2016, past flowers and tributes left outside. France has been stunned again after a large white truck killed many people after it mowed through a crowd of revellers gathered for a Bastille Day fireworks display in the Riviera city of Nice. (AP Photo/Daniel Ochoa de Olza)
Russian Foreign Minister Sergei Lavrov (L) and US Secretary of State John Kerry lay flowers outside the French Embassy in Moscow on July 15, 2016 in tribute to the victims of the deadly attack in the French Riviera city of Nice. Russian President Vladimir Putin condemned the attack in Nice as an act of 'monstrous evil' in a message to his French counterpart. A gunman smashed a truck into a crowd of revellers celebrating Bastille Day in the French Riviera city of Nice, killing at least 84 people in what President Francois Hollande called a 'terrorist' attack. / AFP / Vasily MAXIMOV (Photo credit should read VASILY MAXIMOV/AFP/Getty Images)
People lay flowers outside the French embassy in Moscow on July 15, 2016 in tribute to the victims of the deadly attack in the French Riviera city of Nice. Russian President Vladimir Putin on July 15 condemned the attack in Nice as an act of 'monstrous evil' in a message to his French counterpart. A gunman smashed a truck into a crowd of revellers celebrating Bastille Day in the French Riviera city of Nice, killing at least 84 people in what President Francois Hollande called a 'terrorist' attack. / AFP / VASILY MAXIMOV (Photo credit should read VASILY MAXIMOV/AFP/Getty Images)
A man lays flowers in front of the French embassy in Kiev French the day after a gunman smashed a truck into a crowd of revellers celebrating Bastille Day, killing at least 84 people on July 15, 2016. A Tunisian-born man zigzagged a truck through a crowd celebrating Bastille Day in the French city of Nice, killing at least 84 and injuring dozens of children in what President Francois Hollande on July 15 called a 'terrorist' attack. / AFP / SERGEI SUPINSKY (Photo credit should read SERGEI SUPINSKY/AFP/Getty Images)
NICE, FRANCE - JULY 15: People visit the scene and lay tributes to the victims of a terror attack on the Promenade des Anglais on July 15, 2016 in Nice, France. A French-Tunisian attacker killed 84 people as he drove a lorry through crowds, gathered to watch a firework display during Bastille Day celebrations. The attacker then opened fire on people in the crowd before being shot dead by police.(Photo by Patrick Aventurier/Getty Images)
NICE, FRANCE - JULY 15: People visit the scene and lay tributes to the victims of a terror attack on the Promenade des Anglais on July 15, 2016 in Nice, France. A French-Tunisian attacker killed 84 people as he drove a lorry through crowds, gathered to watch a firework display during Bastille Day celebrations. The attacker then opened fire on people in the crowd before being shot dead by police.(Photo by Patrick Aventurier/Getty Images)
A sand sculpture about the France truck attack looks at the Bay of Bengal Sea's eastern coast beach at Puri, creating by sand artist Sudarshan Pattnaik to condemn this terror attack near by 65 km away from the eastern Indian city Bhubaneswar, India, on 15 July 2016. (Photo by Biswaranjan Rout/NurPhoto via Getty Images)
A man places flowers in front of the French Embassy in Berlin on July 15, 2016, after the deadly attacks in Nice. A man drove a truck into a crowd watching fireworks in the French Riviera city of Nice, killing at least 84 people. / AFP / John MACDOUGALL (Photo credit should read JOHN MACDOUGALL/AFP/Getty Images)
MOSCOW, RUSSIA - JULY 15, 2016: Flowers outside the French Embassy in Moscow commemorating victims of the 2016 terror attack in the French resort city of Nice. On 14 July 2016, a truck ploughed into a crowd of people celebrating Bastille Day on the Promenade des Anglais. 84 people were killed in the attack. Sergei Savostyanov/TASS (Photo by Sergei Savostyanov\TASS via Getty Images)
A girl holds up a placard during a prayer meet to show solidarity with the victims of the Bastille Day truck attack in Nice, at a school in Ahmedabad, India, July 15, 2016. REUTERS/Amit Dave
A man reacts near bouquets of flowers as people pay tribute near the scene where a truck ran into a crowd at high speed killing scores and injuring more who were celebrating the Bastille Day national holiday, in Nice, France, July 15, 2016. REUTERS/Pascal Rossignol
School children offer prayers to pay tribute to the victims of the Bastille Day truck attack in Nice, at a school in Ahmedabad, India, July 15, 2016. The placard reads, "Tribute to the people killed in the terror attack in France". REUTERS/Amit Dave TPX IMAGES OF THE DAY
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The prosecutor said he had placed the five people - an Albanian couple, a Tunisian man and two Franco-Tunisian men - under formal investigation after they were taken into custody. None of them had been known to intelligence services.

Records of Bouhlel's phone use indicated a large number of exchanges, calls and text messages over the last year with several of the accomplices under investigation, he said.

Bouhlel received a text from one of the men a few days after the January 2015 Islamist attacks on the Charlie Hebdo newspaper and a Jewish deli saying: "I am not Charlie ... I am glad, they brought in Allah's soldiers to finish the job."

A day after that text was sent, on Jan. 11, millions of French people rallied in Paris and other French cities under the slogan "Je Suis Charlie" (I am Charlie) in solidarity with the victims at the satirical newspaper.

The July 14 attack by the Tunisian delivery man at peak holiday time on the Riviera plunged France into new grief and fear, just eight months after jihadist gunmen killed 130 people in Paris.

Islamic State has claimed the Nice attack, calling Bouhlel one of its soldiers, but authorities say they have yet to find evidence that the 31-year-old, who was shot dead by police, had any actual links to the militant group.

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