The death toll in Sri Lanka has soared to 290 after a wave of blasts hit churches and luxury hotels across the country on Sunday.

Police said 24 people had been arrested, but it is not yet known who carried out the attacks.

About 500 people are injured and dozens of foreigners are among the dead.

The country is in shock after the Easter Sunday bombings, the deadliest violence since the end of the civil war in 2009.

Late on Sunday Sri Lankan Prime Minister Ranil Wickremesinghe said security services had been “aware of information” of possible attacks but that the information had not been acted upon.