MOSCOW—Russian law enforcement officials are questioning a new suspect over the bombing of a metro train in St Petersburg earlier this month, a source familiar with the investigation told Reuters on Monday.
Fourteen people were killed in the April 3 attack. The suspect is the ninth person to have been detained on suspicion of having colluded with the bomber, Akbarzhon Jalilov, since the attack. Jalilov was killed in the explosion.

A suspect over the recent bombing of a metro train in St Petersburg, while being detained by FSB officers in Moscow region, Russia on on April 17, 2017. Russia's Federal Security Service/RBC/Handout via REUTERS TV