Detectives have arrested a sixth person in connection with last week’s terrorist attack on Parsons Green tube station.
Officers made the arrest shortly after midnight in Thornton Heath in south London.
The 17-year-old boy was arrested under terrorism legislation and was taken to a police station in south London for questioning.
Officers have begun searching the property.
Detectives investigating the Parsons Green terrorist attack have made a further arrest in Thornton Heath this morning, Thursday, 21 September.
So far six people have been arrested, including an Iraqi refugee aged 18 who was detained at Dover Port on September 16.
He has been detained until September 23.
A 21-year-old man in Hounslow was arrested on Saturday.
The third man, a 25-year-old suspect with an address in Newport, South Wales was detained on Tuesday night.
Two men aged 48 and 30 were arrested at a second address in Newport on Wedenesday morning.
Commander Dean Haydon, head of the Met Counter Terrorism Command, said:
‘This continues to be a fast-moving investigation. A significant amount of activity has taken place since the attack on Friday.
‘We now have six males in custody and searches are continuing at five addresses. Detectives are carrying out extensive inquiries to determine the full facts behind the attack.
‘We anticipate that the searches will take some days to complete and may cause further disruption. However, it is important that we continue with these searches and I’d like to thank all those affected for their support, patience and cooperation.
‘As police and our partners do all we can to confront the threat, public vigilance remains as vital as ever.
‘We urge the public to report any suspicious activity to the police by calling us, in confidence, on 0800 789 321, or in an emergency by dialling 999.
‘We are asking the public to look out for anything that seems out of place, unusual or just doesn’t seem to fit in with day-to-day life. It may be nothing, but if you see or hear anything that could be terrorist-related, trust your instincts, then act, and call us.’