Sri Lanka on Monday temporarily blocked some social media networks and messaging apps, including Facebook and WhatsApp, after attacks on mosques and Muslim-owned businesses in the worst unrest since Easter bombings by Islamist militants.

The island nation has ramped up security as fears grow that minority Muslims among its population of 22 million could face sectarian violence after Islamist bombers blew themselves up in four hotels and three churches, killing more than 250 people.

Read more: Reuters