Second London Underground bomb suspect arrested by UK police

A second man was arrested on Sunday by UK police as the hunt continues for suspects behind a bomb attack on a London Underground train on Friday.

Police said a 21-year-old man was detained late Saturday in Hounslow, West London under anti-terror laws.

It follows the arrest of an 18-year-old man on Saturday in Dover, as the suspect allegedly attempted to leave the UK.

A home in Surrey was also raided by police.

Police said they are still looking for other suspects, according to AFP.

It follows Friday's attack at Parsons Green station in south-west London, which injured 30 people.

The bomb apparantely failed to fully detonate, which could have led to deaths and many more injuries, security analysts have said.

The Islamic State group claimed responsibility for the attack.

It is the fifth terror attack in the UK this year, with 36 people killed in attacks also claimed by IS.

Agencies contributed to this story.