TEHRAN: Iran's Foreign Minister Mohammad Javad Zarif expressed condolences after a series of deadly bomb blasts in Sri Lanka on Sunday, saying "terrorism is a global menace with no religion."

The attacks on high-end hotels and churches holding Easter services killed nearly 160 people including dozens of foreigners.

"Terribly saddened by terrorist attacks on Sri Lankan worshippers during Easter. Condolences to friendly govt & people of Sri Lanka. Our thoughts & prayers with the victims & their families," Zarif said on Twitter.

"Terrorism is a global menace with no religion: it must be condemned & confronted globally," he added.

There was no immediate claim of responsibility for the attacks -- the worst act of violence in Sri Lanka since the civil war ended a decade ago.