Police have arrested a 20th person in connection with the London Bridge attack.
A 28-year-old man was held on suspicion of terror offences following a raid in east London, Scotland Yard said.
Officers entered a residential address in Barking shortly after 2am on Saturday. It comes hours after police arrested a 27-year-old man in Ilford.
Seven people are now being held in custody in connection with the atrocity that left eight dead and dozens injured.
The final cordon has been lifted in London Bridge after the attack which killed eight people.
A survivor of the London Bridge atrocity has said she feels lucky to be alive after her throat was cut in the attack.
Police said the fake explosive belts worn by the three London Bridge attackers were designed to cause "maximum fear".