Sri Lanka's Parliament has closed for the premises to be disinfected after COVID-19 was diagnosed in a police officer serving there.

Parliament will be closed for two days as a precautionary measure so the premises can be disinfected, said Narendra Fernando, the parliament’s sergeant at arms said.

Close associates of the officer were also tested, with the results expected later on Monday. An additional 22 parliament staffers will be tested on Tuesday, Fernando said.

A coronavirus cluster that began among garment factory workers earlier this month has grown to 4,400 cases, more than half the country's total of 7,872. The death toll climbed to 16 on Sunday (25).

During the last 24 hours, 351 new patients have been detected and the majority are from the garment cluster.

To contain the spread, the government has closed schools and banned gatherings across Sri Lanka, and a curfew is in effect in many parts of Western province, where the infections have been concentrated.

Several thousand people have been asked to quarantine at home, while another 8,421 people are being quarantined at military-run centers.

The National Operations Centre for the Prevention of COVID-19 (NOCPOC) said that 16 students facing the Advanced Level examination have also tested positive for the virus.

However, NOCPC officials said that they will be allowed to continue their exams at the Infectious Diseases Hospital (IDH) in Angoda.