'Seeing demons': Brother says London stabbing suspect has history of mental illness

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Witnesses Say London Tube Attacker Shouted 'This Is for Syria'

The man charged with stabbing two people in a London tube station Saturday has a history of mental illness and drug use, the suspect's brother told Britain's Channel 4 News Monday.

Before the attack, Mohamed Mire said, his family appealed unsuccessfully to local authorities as his 29-year-old brother, Muhaydin Mire, became more and more paranoid.

Images from the scene:

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'Seeing demons': Brother says London stabbing suspect has history of mental illness
LONDON, UNITED KINGDOM - DECEMBER 05: Police officers and crime scene investigators investigate a crime scene at Leytonstone tube station in east London, England, on December 05, 2015 after a man was seriously injured in a knife attack and it is treated as a terror attack because the attacker reportedly shouted 'This is for Syria' during the attack. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)
LONDON, UNITED KINGDOM - DECEMBER 05: Police officers and crime scene investigators investigate a crime scene at Leytonstone tube station in east London, England, on December 05, 2015 after a man was seriously injured in a knife attack and it is treated as a terror attack because the attacker reportedly shouted 'This is for Syria' during the attack. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)
LONDON, UNITED KINGDOM - DECEMBER 05: Police officers and crime scene investigators investigate a crime scene at Leytonstone tube station in east London, England, on December 05, 2015 after a man was seriously injured in a knife attack and it is treated as a terror attack because the attacker reportedly shouted 'This is for Syria' during the attack. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)
LONDON, UNITED KINGDOM - DECEMBER 05: Police officers and crime scene investigators investigate a crime scene at Leytonstone tube station in east London, England, on December 05, 2015 after a man was seriously injured in a knife attack and it is treated as a terror attack because the attacker reportedly shouted 'This is for Syria' during the attack. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)
LONDON, UNITED KINGDOM - DECEMBER 05: Police officers and crime scene investigators investigate a crime scene at Leytonstone tube station in east London, England, on December 05, 2015 after a man was seriously injured in a knife attack and it is treated as a terror attack because the attacker reportedly shouted 'This is for Syria' during the attack. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)
LONDON, UNITED KINGDOM - DECEMBER 05: Police officers and crime scene investigators investigate a crime scene at Leytonstone tube station in east London, England, on December 05, 2015 after a man was seriously injured in a knife attack and it is treated as a terror attack because the attacker reportedly shouted 'This is for Syria' during the attack. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)
LONDON, UNITED KINGDOM - DECEMBER 05: Police officers and crime scene investigators investigate a crime scene at Leytonstone tube station in east London, England, on December 05, 2015 after a man was seriously injured in a knife attack and it is treated as a terror attack because the attacker reportedly shouted 'This is for Syria' during the attack. (Photo by Tolga Akmen/Anadolu Agency/Getty Images)
A man walks in Leytonstone station in north London on December 6, 2015. Police were called to reports of people being attacked at Leytonstone around 19:00 GMT on December 5. The police have said that they are considering a knife attack the previous evening as a ' terrorist incident' after reports that the man reportedly shouted 'this is for Syria'. The man was arrested after being Tasered by police. One man suffered serious knife injuries while two others received minor injuries. / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
A person walks outside Leytonstone station in north London on December 6, 2015. Police were called to reports of people being attacked at Leytonstone around 19:00 GMT on December 5. The police have said that they are considering a knife attack the previous evening as a ' terrorist incident' after reports that the man reportedly shouted 'this is for Syria'. The man was arrested after being Tasered by police. One man suffered serious knife injuries while two others received minor injuries. / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
A police car is seen parked outside Leytonstone station in north London on December 6, 2015. Police were called to reports of people being attacked at Leytonstone around 19:00 GMT on December 5. The police have said that they are considering a knife attack the previous evening as a ' terrorist incident' after reports that the man reportedly shouted 'this is for Syria'. The man was arrested after being Tasered by police. One man suffered serious knife injuries while two others received minor injuries. / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
A police car is seen parked outside Leytonstone station in north London on December 6, 2015. Police were called to reports of people being attacked at Leytonstone around 19:00 GMT on December 5. The police have said that they are considering a knife attack the previous evening as a ' terrorist incident' after reports that the man reportedly shouted 'this is for Syria'. The man was arrested after being Tasered by police. One man suffered serious knife injuries while two others received minor injuries. / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
A television crew broadcasts from outside Leytonstone station in north London on December 6, 2015. Police were called to reports of people being attacked at Leytonstone around 19:00 GMT on December 5, 2015. The police have said that they are considering a knife attack the previous evening as a ' terrorist incident' after reports that the man reportedly shouted 'this is for Syria'. The man was arrested after being Tasered by police. One man suffered serious knife injuries while two others received minor injuries. / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
A police officer stands guard outside Leytonstone station in north London on December 6, 2015, a day after three people were stabbed in what police are treating as a 'terrorist incident'. A man was being held in custody after three people were stabbed at a London Underground train station in an attack police were treating as a 'terrorist incident'.One eyewitness shouted 'You're no Muslim' at the suspect as he was pinned down by police officers at the suburban Leytonstone station, amateur video footage showed, while a pool of blood was seen in the ticket hall. / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
A police vehicle drives past Leytonstone station in north London on December 6, 2015. Police were called to reports of people being attacked at Leytonstone around 19:00 GMT on December 5, 2015. The police have said that they are considering a knife attack the previous evening as a ' terrorist incident' after reports that the man reportedly shouted 'this is for Syria'. The man was arrested after being Tasered by police. One man suffered serious knife injuries while two others received minor injuries. / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
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Unsure of what to do, Mohamed said he even booked a flight for his brother back to Somalia, where he as born, for Sunday — the day after the stabbing at Leytonstone Underground Station.

Both victims were treated for non-life threatening injuries.

The revelations come as Muhaydin was charged with attempted murder and as British authorities investigated the attack as a terrorist "incident." Witnesses told Channel 4 that they heard Muhaydin shout "This is for Syria" after being taken into police custody.

Related: London Tube Stabbing Triggers Hashtag: #YouAintNoMuslimBruv

On Monday, the United Kingdom remained under a "severe" threat from international terrorism.



Mohamed Mire told the channel that Muhaydin — who has lived in Britain since he was 12 — was diagnosed with paranoia. In 2007, he was hospitalized for three months, but marijuana use, Mohamed said, only exacerbated his mental illness.

"He's seeing demons and all that," Mohamed said, adding that his family tried to have Muhaydin committed.

After talking with his mother in Somalia, Mohamed said, he booked a flight for his brother.

"As far as I know, he wanted to go," Mohamed said.

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