British Police raided two more houses in east London on Monday morning in connection with the horrific London Bridge terror attack that left seven people dead.
Neighbours awoke to the sound of “gunfire and explosions” as counter-terrorism officers entered homes in Newham and Dagenham at 4.15am.
The Met said “a number of people” were detained and were being interviewed by detectives.
Officers were searching both houses following the dawn raids, a spokesman added.
Pictures posted on social media showed heavily armed police and an unmarked black van near to the A13 in Dagenham.
Twitter user BatemanLDN said: “It woke me up along with the whole street. Extremely loud bangs followed by gunshot bangs.
“All ok – very shaken residents nearby though. All quietened down now.”
Simon Tucker wrote: “Heard this in the Dagenham area at around 4.15 am. Started with loud explosion sound. Followed by about 20 shots, some sounded distant.”
Dean Wilson said: “Gunfire and explosions in #Dagenham? Helicopters are out too. Not the wake up I was expecting.
Police arrested 12 people on Sunday after seven people were killed and 21 critically wounded in Saturday night’s attack.
Seven women and five men were held at two separate addresses in Barking.
A Met spokesman said on Monday morning: “At around 04:15hrs on Monday, 5 June, officers from the Met’s Counter Terrorism Command investigating the London Bridge terror attack entered two further addresses – one in Newham and another in Barking.
“A number of people have been detained and are at present being spoken to.
“Searches are ongoing at both addresses.”
Armed officers stormed flats in Kings Road, Barking, around 7am on Sunday, just hours after three suspects launched a horrific attack on the capital, mowing down pedestrians on London Bridge before stabbing revellers in nearby Borough market.
Several men were pictured laying face down in the road handcuffed, while others were later led from the flat alongside four women. The arrests marked the first by police over the attack which killed seven and wounded 48, including 21 people left in critical.
The attackers were shot dead by police marksmen just eight minutes after terrified bystanders dialled 999.
One of the killers is thought to have lived at the apartment block in Kings Road.