British police on Tuesday arrested a third suspect over the bombing of a packed London Underground train that injured 30 people last week.

The 25-year-old man was detained by anti-terror officers in Newport, Wales, London’s Metropolitan Police said in a statement, without divulging any identifying information on the suspect.

“A search is taking place at an address in the Newport following the arrest,” police added.

Thirty passengers were left injured when the bomb, which is thought to have malfunctioned, went off on a London Underground train at the Parsons Green station during rush hour on Friday morning.