Police officers and members of the emergency services attend to a person injured in an apparent terror attack on London Bridge in central London on June 3, 2017.
Armed police fired shots after reports of stabbings and a van hitting pedestrians on London Bridge on Saturday in an incident reminiscent of a terror attack in March just days ahead of a general election. / AFP PHOTO / DANIEL SORABJI        (Photo credit should read DANIEL SORABJI/AFP/Getty Images)
DANIEL SORABJI/AFP/Getty Images
Police officers and members of the emergency services attend to a person injured in an apparent terror attack on London Bridge in central London on June 3, 2017. Armed police fired shots after reports of stabbings and a van hitting pedestrians on London Bridge on Saturday in an incident reminiscent of a terror attack in March just days ahead of a general election. / AFP PHOTO / DANIEL SORABJI (Photo credit should read DANIEL SORABJI/AFP/Getty Images)
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Police officers escort a person, with their head covered, to a police van, in Barking, east London on June 5, 2017, following a dawn raid on a property (R), as thier investigations continue following the June 3 terror attacks in central London.
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Police officers escort a person, with their head covered, to a police van, in Barking, east London on June 5, 2017, following a dawn raid on a property (R), as thier investigations continue following the June 3 terror attacks in central London. Police carried out fresh raids and arrested "a number of people" on Monday after the Islamic State group claimed an attack by three men who mowed down and stabbed revellers in London on June 3, killing seven people, before being shot dead by officers. / AFP PHOTO / Daniel LEAL-OLIVAS (Photo credit should read DANIEL LEAL-OLIVAS/AFP/Getty Images)
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Emergency personnel on London Bridge after an incident in central London, Saturday, June 3, 2017. British police said they were dealing with "incidents" on London Bridge and nearby Borough Market in the heart of the British capital Saturday, as witnesses reported a vehicle veering off the road and hitting several pedestrians. (Dominic Lipinski/PA via AP)
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Emergency personnel on London Bridge after an incident in central London, Saturday, June 3, 2017. British police said they were dealing with "incidents" on London Bridge and nearby Borough Market in the heart of the British capital Saturday, as witnesses reported a vehicle veering off the road and hitting several pedestrians. (Dominic Lipinski/PA via AP)
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Police officers on Borough High Street as police are dealing with an incident on London Bridge in London, Saturday, June 3, 2017.    Witnesses reported a vehicle hitting pedestrians and injured people on the ground. (Dominic Lipinski/PA via AP)
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Police officers on Borough High Street as police are dealing with an incident on London Bridge in London, Saturday, June 3, 2017. Witnesses reported a vehicle hitting pedestrians and injured people on the ground. (Dominic Lipinski/PA via AP)
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LONDON, ENGLAND - JUNE 04:  Armed police officers stand guard at the perimeter cordon, following last night's London terror attack, on June 4, 2017 in London, England. Prime Minister Theresa May has left the election campaign trail to hold a meeting of the emergency response committee, Cobra, this morning following a terror attack in central London on Saturday night. 7 people were killed and at least 48 injured in terror attacks on London Bridge and Borough Market. Three attackers were shot dead by armed police.  (Photo by Leon Neal/Getty Images)
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LONDON, ENGLAND - JUNE 04: Armed police officers stand guard at the perimeter cordon, following last night's London terror attack, on June 4, 2017 in London, England. Prime Minister Theresa May has left the election campaign trail to hold a meeting of the emergency response committee, Cobra, this morning following a terror attack in central London on Saturday night. 7 people were killed and at least 48 injured in terror attacks on London Bridge and Borough Market. Three attackers were shot dead by armed police. (Photo by Leon Neal/Getty Images)
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(CNN) —  

Extra security was visible across London Monday as police carried out more raids at addresses in the city’s east following the terror attack on the weekend.

Seven people were killed and dozens injured when three men – later shot by police – rammed pedestrians at London Bridge and randomly knifed people at Borough Market.

It was the third terror strike in the UK this year, after a man drove a car into pedestrians on Westminster Bridge in March and a bomb attack on an Ariana Grande concert in Manchester two weeks ago.