COLOMBO, Sri Lanka (AP) — Sri Lanka's prime minister says suspects linked to the coordinated Easter Sunday bomb attacks remain at large and could have access to explosives.

Some of the suspects "may go out for a suicide attack," Prime Minister Ranil Wickremesinghe said in an interview Thursday with The Associated Press.

Wickremesinghe spoke frankly about the greatest challenge the South Asian island nation has faced since its civil war ended a decade ago.

More than 350 people were killed and another 500 people wounded in the string of suicide bombings at churches and luxury hotels in and around the capital, Colombo.