Sri Lanka blocked Facebook, WhatsApp and other social media platforms on Monday after anti-Muslim riots hit several towns in the latest fallout from the Easter Sunday suicide attacks.
Christian groups attacked Muslim-owned shops in a sign of the continued religious tension in Sri Lanka since the April 21 attacks by jihadist suicide bombers on three hotels and three churches which left 258 dead.
A state of emergency has been in place since the bombings — which the Islamic State group claims to have helped — and security forces have been given sweeping powers to arrest and detain suspects for long periods.
Police said a mob targetted shops in the north-west town of Chilaw on Sunday in anger at a Facebook post by a shopkeeper. Security forces fired into the air to disperse the crowd, but the violence spread to nearby towns where Muslim businesses were also attacked.
A motorcycle gang attacked shops in nearby Kuliyapitiya and four members were arrested, officials said. However, dozens of people laid siege to the police station and forced their release.
Despite a night curfew, a mosque was vandalised, local residents said.
Police said the curfew in Chilaw and nearby areas was relaxed Monday, but the social media ban was brought in to head off new violence.