Russia’s second suicide bombing in 48 hours has prompted its government to call for international solidarity in the fight against “terrorists”.
Russian officials now say 14 people died after an explosion on a trolley bus in the southern city of Volgograd on Monday.
It comes after Sunday’s suicide bomb attack on the city’s train station, which has now claimed 17 lives.
The country’s foreign ministry likened the bombings to attacks by militants in the United States and Syria.
It added: “We will not retreat and will continue our consistent fight against an insidious enemy that can only be defeated together.”
It did not place direct blame on any particular group for the attacks but said they came against a backdrop of threats from militants such as Doku Umarov, leader of an Islamist insurgency in the North Caucasus who has called on fighters to prevent Russia holding the Winter Olympics in February.
The bombings have prompted President Vladimir Putin to put Russia on high alert. However, insurgents have vowed to prevent the 2014 Games in Sochi from going ahead.
In the latest attack, police and ambulances reportedly arrived quickly on the scene as emergency services treated the wounded. The bus is a shell of its former self; its roof was blown off and debris strewn around the street.