The London Bridge and Borough Market attackers are about to be named

Theresa May delivered a speech on Monday, 11 a.m. BST (6 a.m. ET), saying that Britain needs her strong leadership "now more than ever," following the London Bridge and Borough Market terror attacks on Saturday.

"Today I want to return to the choice people face in three days time. It's about which leader and which team people trust to keep Britain safe," May said.

The Metropolitan Police know the identities of the three men who carried out the attacks which killed seven people and injured 48, saying their names would be released "as soon as operationally possible."

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Meanwhile, ISIS (also known as the Islamic State, ISIL, and Daesh) claimed responsibility for the attacks. According to a statement posted to its "Amaq" propaganda outlet, ISIS said a "detachment" of its fighters had carried out the attacks.

The Metropolitan Police released a statement at 9:30 a.m. BST (4:30 a.m. ET) saying:

"One BTP [British Transport Police] officer and three Met officers were injured during the attack on Saturday night. The further two Met officers were both on duty Southwark officers. One a plain clothes officer who received stitches to a head injury and a uniformed officer received an injury to his arm.

"The off duty Southwark officer remains in hospital in a serious condition."

Police conduct multiple raids and arrests

Police conducted multiple raids in East Ham Sunday morning as part of their ongoing investigation into the attacks. Twelve people were arrested in an earlier raid that day on a block of flats in Barking, London.

Of the 12 people arrested, seven are women, aged between 19 to 60. The five men that were arrested were between 28 and 55 years old. A 55-year-old man has since been released without charge on Monday morning.

The remaining 11 are being detained on suspicion of offences under the Terrorism Act, police said. Police can hold them for up to two weeks before they decide whether they should be released or charged.

The East London neighborhood is home to many Muslims and it is common to see women wearing the burka there.

During the Barking Road raid, police reportedly warned a suspect running across a roof to "get back or we'll shoot." Video footage also shows armed officers pointing their weapons towards the roof and shouting, "Stand up, show us your hands" at the suspect.

Police are also searching two other addresses in East London — one in Newham and another in Barking. The Met said it entered properties in Newham and Barking at 4:15 a.m. BST.

Here is another location where police are conducting searches:

The Prime Minister delivers a strong statement against countering terrorism

Prime Minister Theresa May delivered a strong statement against "Islamist extremism" and the internet services companies who offer it "the safe space it needs to breed." She said "it is time to say enough is enough" and repeated, "things need to change."

She said "things need to change and they need to change in four important ways." That includes:

[The government will tackle] "safe spaces that continue to exist in the real world. That means taking military action to destroy ISIS in Iraq and Syria ... [and] here at home, there is, to be frank, far too much tolerance of extremism in our country. So we need to become far more robust in identifying it and stamping it out across the public sector and across society. That will require some difficult, and often embarrassing, conversations."

You can read highlights and the full text of her speech here.

Her speech was also criticised by left-wing journalists for furthering her general election campaign on a day when the parties had pledged to cease campaigning due to the deaths. Owen Jones told Sky News that "Theresa May broke the agreement on no political campaigning after the atrocity — and now must have her own record scrutinised."

Some are also blaming May for security failures which, they claim, led to the terrorist attacks in London Bridge, Manchester and Westminster, over the last three months:

Former director of global counter-terrorism at MI6, Richard Barrett, wrote in the Guardian that May's "enough is enough" policies could make extremist threats worse.

Jeremy Corbyn, the leader of the main opposition Labour, also delivered his own speech:

Victims are being named

Chrissy Archibald, a Canadian bride-to-be who volunteered at a homeless shelter, was the first victim to be named.

The six other victims are yet to be named. 48 patients were taken to five hospitals and out of those people, 21 are said to be in a critical condition. The Metropolitan Police opened a casualty bureau for those worried about the whereabouts of people they know. The telephone numbers are 0800 096 1233 and 020 7158 0197.

A number of posts on social media and from foreign governments have identified some of those affected by the attacks.

Jean-Yves Le Drian, French foreign minister, confirmed that a French man was one of the seven killed in the attack but did not name him. He also said seven French citizens were among the 48 injured.

The Greek embassy in London said a citizen based in the capital was injured in the attack and has been operated on after being knifed in the kidney, according to the Guardian:

"He sustained head injuries and was stabbed in the kidney but has been operated on and is in stable condition, out of danger," Alexis Georgiadis, a spokesman at the Greek embassy, told the Guardian. "I have just spoken with his father and our ambassador will be visiting him today."

The Canberra government in Australia named Candice Hedge, from Brisbane, and Andrew Morrison, from Darwin as both wounded and said that there are two more Australian citizens "about whom we have very real concerns."

Meanwhile, one of those injured was an unnamed British man was accidentally shot in the head by police opened fire on the attackers.

London Bridge reopens

London Bridge station, as well as the bridge itself, reopened on Monday after it was shut, following the terrorist attacks on Saturday:

Major train operator Southern Rail said in another tweet: "Please avoid #LondonBridgestation during this morning's peak, please use alternative stations. For details visit http://southernrailway.com"

The Metropolitan police also said:

"Police cordons around the station were lifted earlier than expected, meaning the national rail station will be open as usual. London Bridge itself – across the Thames – and nearby roads have reopened as well."

The underground station at London Bridge is also open but there will be restricted entry and exit via Tooley Street.

Parts of Borough Market are still cordoned off at some points: