Five members of the same family - including three teenage girls - have been arrested in a counter-terrorism swoop.
They were held on suspicion of "possessing information likely to be useful to a person committing or preparing an act of terrorism", Scotland Yard said.
The five - a 51-year-old man, a 53-year-old woman, and girls aged 16, 17 and 19 - were arrested at an address in east London this morning.
The man was additionally detained on suspicion of possessing false identity documents "with improper intention".
All five are currently in police custody at a central London police station.
Police said the arrests are part of an ongoing inquiry which previously saw the 16-year-old girl arrested last month on suspicion of preparation of terrorism.
She is currently on police bail to a date in September pending further inquiries in relation to that matter, a Scotland Yard spokesman said.