Putin vows to punish those behind Russia concert massacre

A digital board with a date and a slogan, that reads "We mourn" displayed in memory of victims of the shooting incident, is seen opposite the burning Crocus City Hall concert venue on the outskirts of Moscow, Russia, March 23, 2024. REUTERS/Maxim Shemetov

MOSCOW (Reuters) -Russia said on Saturday it had arrested all four gunmen suspected of carrying out a shooting massacre in a concert hall near Moscow, and President Vladimir Putin pledged to track down and punish those behind the attack.

Militant Islamist group Islamic State claimed responsibility for Friday's rampage, but there were indications that Russia was pursuing a Ukrainian link, despite emphatic denials from Ukrainian officials that Kyiv had anything to do with it.