London, United Kingdom : British police on Thursday released two men arrested in connection with the bombing of a London Underground train last week, leaving four suspects in custody over the attack.
A 21-year-old was released with no further action following his arrest late Saturday in Hounslow, west London, the Metropolitan Police said in a statement.
Shortly afterwards a 48-year-old man, one of three arrested earlier this week in Wales, was also released without charge.
Dean Haydon, the force's head of counter-terrorism, said the probe into the bomb attack at Parsons Green station "continues to be a fast-moving investigation" and searches are ongoing at four addresses.
Placed on a packed train during morning rush hour, the improvised device injured 30 people when it went off despite apparently malfunctioning.
The attack in Parsons Green, a quiet residential area, caused panic among commuters and some were hurt in the stampede as people fled the scene.
Police made a first arrest a day later when they picked up an 18-year-old man at Dover, a port in the southeast which serves as a gateway to Europe.
The investigation subsequently shifted to Newport in Wales, where the 48-year-old released on Thursday was arrested, as well as two men aged 25 and 30 who remain in police custody.
The most recent arrest came in the early hours of Thursday, when a 17-year-old suspect was detained in Thornton Heath in south London.
The tube bombing was the fifth terror attack in Britain in sixth months -- four of them in London and one in Manchester -- with the bloodshed claiming 35 lives.
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
A 21-year-old was released with no further action following his arrest late Saturday in Hounslow, west London, the Metropolitan Police said in a statement.
Shortly afterwards a 48-year-old man, one of three arrested earlier this week in Wales, was also released without charge.
Placed on a packed train during morning rush hour, the improvised device injured 30 people when it went off despite apparently malfunctioning.
Advertisement
Police made a first arrest a day later when they picked up an 18-year-old man at Dover, a port in the southeast which serves as a gateway to Europe.
Advertisement
The most recent arrest came in the early hours of Thursday, when a 17-year-old suspect was detained in Thornton Heath in south London.
Advertisement
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
COMMENTS
Advertisement
''Wrestlemania'': Punches, Kicks Fly As Fight Breaks Out In Crowded London Train King's Cross Station In London Evacuated Briefly, After Fire Alert London Underground Train Passes Over Family Of Three, They Escape Unhurt Amid Huge Row, Karnataka Pauses Bill For Reservation In Private Sector Firms Travel Influencer Aanvi Kamdar Dies After Falling Off A Waterfall Near Mumbai UP Banker Dies By Suicide After 6 Months Of Bullying, Body-Shaming UK's New Government Vows To Remove 92 Unelected Peers From Upper House EU's Carbon Tax Could Cost India 0.05% Of GDP: Report Trainee IAS Summoned By Pune Cops Over Harassment Claims Against Collector Track Latest News Live on NDTV.com and get news updates from India and around the world.