At least 12 people were killed in an explosion inside a mosque in the Afghan capital Kabul during Friday prayers as worshippers gathered for the second day of the Eid al-Fitr holiday, officials said.
Ferdous Faramarz, spokesman for the Kabul police, said the mosque's Imam was among the 12 dead and at least 15 other people were wounded. He did not identify the mosque where the blast took place.
There was no immediate claim of responsibility for the attack. Taliban insurgents have called a three-day ceasefire for the holiday, which marks the end of the Ramadan holy fasting month.
The blast came less than a week after an explosion at a school killed 80 people. The Taliban denounced that attack and no one has claimed responsibility for it.
US officials believe it may have been the work of a rival militant group such as the IS.
Violence, including attacks on civilians, have increased in Afghanistan, even as the United States has begun an operation to withdraw all its remaining troops over the next four months.
The US and Iran failed to reach an agreement to end their war despite marathon talks that concluded on Sunday in the Pakistani capital Islamabad, jeopardising a fragile ceasefire.
Russia and Ukraine accused each other on Sunday of breaching the 32-hour ceasefire in their four-year war, reporting more than a thousand drone and shelling attacks just hours after the truce began on Saturday to mark Orthodox Easter.
At least 30 people were killed on Saturday in a stampede at the Laferriere Citadel in the northern countryside of Haiti, authorities said, warning that the death toll could rise.
A cyclone battered New Zealand's North Island on Sunday, cutting power to thousands of residents and forcing hundreds to evacuate, as officials warned conditions would worsen through the day.
Negotiations between the United States and Iran appeared to have concluded for now, Iran's government has announced early on Sunday, after a series of talks in Pakistan to end the six-week war between Washington and Tehran.