(CNN) —
British police have identified two of the three men behind Saturday night’s terror attack in London as Khuram Shazad Butt and Rachid Redouane.
Butt, 27, was a British citizen who was born in Pakistan, London’s Metropolitan Police said. Police and MI5, the UK’s counterintelligence and security agency, were familiar with him, but there was no intelligence to suggest the weekend attack was being planned, police said.
Butt briefly worked for Transport for London, the entity that oversees the city’s public transport system. He was a trainee customer services assistant with London Underground for less than six months, before leaving in October, a Transport for London spokesperson said.
Redouane, 30, who also used the name Rachid Elkhdar, had claimed to be Moroccan and Libyan.
The third attacker has been identified, police said, but his name has not been publicly released.
130 British imams refuse to bury London attackers
The assailants killed seven people and wounded 48 others by ramming a vehicle into a crowd on London Bridge and then stabbing people in nearby Borough Market.
Photos: London Bridge, nearby cafe target of terror attack
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Forensic officers work at the scene of a terror attack at London Bridge in London on Sunday, June 4. At least seven people were killed in attacks late Saturday as a van mowed down pedestrians on London Bridge before attackers then stabbed victims at nearby Borough Market.
Photos: London Bridge, nearby cafe target of terror attack
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Counterterrorism officers patrol near the scene of the attack on London Bridge. When speaking to the media on Sunday, British Prime Minister Theresa May did not announce any increase in the UK terror threat level.
Photos: London Bridge, nearby cafe target of terror attack
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A woman reacts after asking a Police officer to lay flowers near London Bridge as a tribute to the victims of the attack.
Photos: London Bridge, nearby cafe target of terror attack
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DANIEL LEAL-OLIVAS/AFP/Getty Images
UK police officers on Sunday continue their investigation into the terror attacks on London Bridge and in a nearby restaurant district. The attacks on June 3 came days before a general election and two weeks after 22 people were killed when a suicide bomber targeted an Ariana Grande concert in Manchester.
Photos: London Bridge, nearby cafe target of terror attack
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Prime Minister Theresa May makes a statement at 10 Downing Street, following a Cobra security meeting in response to Saturday night's terror attack. Violence must "never be allowed to disrupt the democratic process," May said, adding that Thursday's general election will go ahead.
Photos: London Bridge, nearby cafe target of terror attack
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Abandoned buses line London Bridge as the scene remains under investigation following the attack. Metropolitan Police Assistant Commissioner Mark Rowley said in a statement Sunday that a white van struck pedestrians on London Bridge. Attackers then left the vehicle and "a number of people were stabbed, including an on-duty British Transport Police officer who was responding to the incident at London Bridge," said Rowley. The officer received serious but not life-threatening injuries.
Photos: London Bridge, nearby cafe target of terror attack
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Counter terrorism officers move up an escalator under The Shard, an iconic highrise near the scene of last night's London Bridge attack.
Photos: London Bridge, nearby cafe target of terror attack
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PA Images/Sipa
A group of police forensic officers walks in the street outside Borough Market.
Photos: London Bridge, nearby cafe target of terror attack
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Furqan Nabi/AP
People lie on the ground after being detained by police at Elizabeth Fry apartments in Barking, east London, which officers raided Sunday, June 4, following Saturday's terror attack at London Bridge and Borough Market.
Photos: London Bridge, nearby cafe target of terror attack
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A bouquet of flowers left near the police cordon at London Bridge on June 4.
Photos: London Bridge, nearby cafe target of terror attack
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Sanya Burgess/The Sunday Times
A view from above shows where a van struck pedestrians on London Bridge -- and then crashed into a barrier.
Photos: London Bridge, nearby cafe target of terror attack
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Gabriele Sciotto
This image, from London's Borough Market, shows two of the attackers after they were shot by London police. The attackers drove a white van into pedestrians on London Bridge, leaving bodies lying in the roadway, a witness to the incident told CNN.
Photos: London Bridge, nearby cafe target of terror attack
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Armed police patrol near London Bridge on Saturday, June 3. Mayor Sadiq Khan said it was a "deliberate and cowardly attack" on Londoners enjoying Saturday night out.
Photos: London Bridge, nearby cafe target of terror attack
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The white van used in the attack is seen near London Bridge.
Photos: London Bridge, nearby cafe target of terror attack
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Rob Pinney/London News Pictures/Zuma
Police carry out a search near empty buses on London Bridge, Saturday, June 3.
Photos: London Bridge, nearby cafe target of terror attack
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A person is treated for injuries near London Bridge.
Photos: London Bridge, nearby cafe target of terror attack
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Members of the public flee after reports of the incident involving a vehicle and pedestrians.
Photos: London Bridge, nearby cafe target of terror attack
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Police and emergency responders attend to an injured person.