Sri Lanka has held its first mass funeral amid a day of mourning for the victims of Sunday’s bomb blasts.
The death toll from the attacks on churches and hotels has risen to 321 with about 500 wounded, police said.
A state of emergency is in effect to prevent further attacks.
The Islamic State (IS) group claimed the attack on Tuesday via its news outlet. Sri Lanka’s government has blamed the blasts on local Islamist group National Thowheed Jamath (NTJ).
A BBC correspondent in Sri Lanka says the IS claim should be treated cautiously. The group usually claims an attack very soon afterwards, publishing pictures of those who carried it out on its media portal, Amaq.
Police have now detained 40 suspects in connection with the attack. A spokesman said they included a Syrian who was arrested “after the interrogation of local suspects”.