Sri Lankan Prime Minister Ranil Wickremesinghe has declared a state of emergency in his role as the acting president.
"The prime minister as acting president has declared a state of emergency (countrywide) and imposed a curfew in the western province," Wickremesinghe's media secretary, Dinouk Colombage, told Reuters.
The curfew comes into effect immediately.
It comes after President Gotabaya Rajapaksa fled to the Maldives on Wednesday, leading to more protests amid an economic crisis.

US Epstein files release highlights Clinton, makes scant reference to Trump
Bangladesh holds state funeral for slain youth leader amid tight security
US hits ISIS in Syria with large retaliatory strikes, officials say
Pakistan court hands Imran Khan, wife 17-year jail terms in another graft case
Seven elephants killed in India train accident
Israeli attack on school shelter in Gaza City kills 5 Palestinians
Nine injured in attack in Taipei, media reports
Putin offers no compromise on Ukraine, says EU 'robbery' failed
