Sri Lanka on Saturday approved Pfizer's COVID-19 vaccine for emergency use.
It comes as the island nation battles a third wave of the virus, while suffering a restricted supply of vaccines from neighbouring India.
Dr. Sudharshani Fernandopulle, the minister overseeing the fight against the epidemic, said in a statement the government would order 5 million doses of the Pfizer vaccine.
Sri Lanka is seeking to secure other vaccines as the Serum Institute of India, the world's largest vaccine manufacturer, has suspended the delivery of AstraZeneca's Covishield vaccine due to spiralling coronavirus infections in India.
Sri Lanka is the first country in South Asia to approve the Pfizer vaccine. It has also approved Russia's Sputnik and China's Sinopharm vaccines for emergency use.
The island nation reported 1,914 new cases and 19 deaths in the past 24 hours, according to federal health data, and its total number of active cases is higher than any point since the pandemic began.
Infections surged after crowded celebrations for traditional New Year last month.
US President Donald Trump on Saturday threatened to "obliterate" Iran's power plants if Tehran does not fully reopen the Strait of Hormuz within 48 hours, a dramatic escalation that came barely a day after he talked about "winding down" the war.
Saudi Arabia informed Iran's military attache, his assistant and three members of the embassy staff that they must leave the kingdom within 24 hours after being declared persona non grata, the Saudi foreign ministry said on Saturday, citing what it described as continued Iranian attacks on Saudi territory.
Ukrainian and US negotiators trying to move towards a settlement of the four-year war pitting Kyiv against Moscow opened their latest round of talks in Florida on Saturday, with more discussions planned through the weekend.
US President Donald Trump threatened to deploy Immigration and Customs Enforcement agents to US airports on Monday if congressional Democrats do not immediately agree to fund airport safety.
Robert Mueller, the no-nonsense former FBI chief who documented Russia's interference in the 2016 US election and its contacts with Donald Trump's campaign but opted not to bring criminal charges against a sitting president, has died at age 81.