A 20-year-old man has become the seventh suspect arrested over the Parsons Green terror attack.
The man was apprehended at an address in Cardiff during a police swoop at 6am today, Scotland Yard said.
He has been taken to a south London police station where he is being quizzed by detectives.
The crude homemade bomb (pictured) failed to fully detonate in the tube carriage at Parsons Green, west London, during the attack on September 15
The arrests were carried out by officers from the Met’s Counter Terrorism Command, supported by colleagues from the Welsh Extremism and Counter Terrorism Unit and South Wales Police.
Officers are also carrying out a search at an address in Cardiff.
So far only one person has been charged in relation to the attack, which injured 30 when a home-made bomb partially detonated on a Tube train in west London, on September 15.
Counter-terror Police have made arrests in Dover, London, Cardiff and Newport, in south Wales. Pictured, officers outside the home of Ahmed Hassan, 18, in Sunbury, Surrey
Seven people have been arrested in swoops across Britain, in the 10 days since the attack
Three people remain in police custody and three people have been released with no further action.
Ahmed Hassan, 18, from Sunbury in Surrey, was charged with attempted murder and an explosives offence.
He appeared at Westminster Magistrates’ Court on Friday, where he was remanded in custody to appear at the Old Bailey on Friday, 13 October.
He was arrested in Dover, Kent, at around 07:50am, just a day after the attack.
Police apprehended Hassan after spotting him in departures waiting for a ferry to France.
The teen allegedly built the explosive device at his home, where he lives with foster carers Ron and Penelope Jones.
Ahmed Hassan, 18, sketched in the dock when he appeared at Westminster Magistrates’ Court
He then got a train from Sunbury-on-Thames to Wimbledon, where he switched and boarded the District line and planted the bomb, the court heard.
Along with the 20-year-old man, a 25-year-old man, and a 30-year-old man also remain in police custody in connection with the investigation.
A 17-year-old male arrested on Thursday, 21 September was released from police custody with no further action on Friday, 22 September.
Two men – aged 48 and 21 – were released from police custody on Thursday, 21 September, with no further action.
Searches are ongoing at one address in Surrey and one address in Cardiff.
Searches at other addresses in Surrey, Hounslow and Newport have all been completed.
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