Burnt-out vehicles outside Sri Lankan President Gotabaya Rajapaksa's private residence in Colombo on Friday

Sri Lanka’s government has blocked access to social media and imposed a 36-hour curfew, following protests against food and fuel shortages.

President Gotabaya Rajapaksa issued a notice prohibiting anyone from being on any public road, in a park, on trains, or on the seashore, unless they have written permission from the authorities.

The curfew began at dusk on Saturday.

The social media sites blocked include Facebook, Twitter and Instagram.

WhatsApp is also down, and mobile phone users received a message saying this was “as directed by the Telecommunications Regulatory Commission”.

The stringent restrictions are aimed at preventing new protests, after crowds were accused of setting vehicles ablaze near the president’s private residence on Thursday.

The military has since been deployed and now has the power to arrest suspects without warrants.

The island nation is in the midst of a major economic crisis. It is caused in part by a lack of foreign currency, which is used to pay for fuel imports.

Faced with power cuts lasting half a day or more, and a lack of fuel and essential food and medicines, public anger has reached a new high.

Thursday’s protest outside President Rajapaksa’s Colombo house began peacefully, but participants said things turned violent after police fired tear gas, water cannons and also beat people present.

Protesters retaliated against the police by pelting them with stones.

At least two dozen police personnel were reportedly injured during the clashes, according to an official cited by Reuters news agency.

On Friday, 53 demonstrators were arrested, and local media reported that five news photographers were detained and tortured at a police station. The government said it would investigate the latter claim.

Despite the crackdown, protests continued, and spread to other parts of the country.

Demonstrators in the capital carried placards calling for the president’s resignation. The demonstrations mark a massive turnaround in popularity for Mr Rajapaksa, who swept into power with a majority win in 2019, promising stability and a “strong hand” to rule the country.

Food and fuel have been in short supply for weeks, now people fear they’re losing their basic liberties after the government blocked access to social media sites, including YouTube, Instagram and Facebook, WhatsApp and TikTok. Many believe it’s to prevent people organising protests and to shut down criticism.

Police and the military are on the streets of Colombo, mass demonstrations had been planned today but with a curfew and state of emergency in place most people have stayed home. The streets of the capital are mostly deserted, but we encountered one small protest arranged by the opposition party.

Overnight, the authorities in the West of the country say they arrested more than 600 people for violating the curfew. The government says it’s brought in the curfew to maintain order after protests turned violent last week But many people we’ve spoken to – from all walks of life blame the authorities for mismanaging this crisis.

Frustration is growing. “Enough is enough,” Roshinta, a student, told me as she held a placard in the city-centre before the curfew kicked in. “Millions of people are suffering, and we are angry”.