A suicide bomber blew himself up in Russia's North Caucasus region of Karachay-Cherkessia Friday, injuring six police officers, the country's National Anti-Terrorism Committee said.

A suicide bombing on Saturday at an education centre in Afghanistan's capital Kabul killed at least 13 people and wounded dozens, officials said.

At least 95 injured in a car bomb blast west of Kabul, Afghan authorities announced Wednesday.

Kenyans, Americans, a Briton and Tanzanians were among 26 people killed when Islamist gunmen stormed a hotel in the Somali port city of Kismayo, officials said on Saturday, the deadliest attack in the city since insurgents were driven out in 2012.

A suicide bomber on foot targeted a wedding party in Afghanistan's eastern province of Nangarhar on Friday, killing at least five people and injuring 40, local officials said.

The streets of Sri Lanka's Katuwapitiya should be full of the sound of children's games. But after deadly Easter attacks that killed at least 45 children, they have fallen silent.

Syrian government forces fought off an attack by a group of suicide bombers on a position in western Syria on Tuesday, during which three people were killed in addition to all of the militants, a state-run TV station reported.

The wife and son of a suspected militant Islamist blew themselves up in their home on the Indonesian island of Sumatra early on Wednesday after hours of tense negotiations with counter-terrorism officers, authorities said.

Eleven people were dead on Saturday after two suicide bombers and a gunman attacked a mosque in the north-eastern Nigerian city of Maiduguri, a police official said.

A US Navy servicewoman and a former Navy SEAL are among the four Americans killed in a suicide bombing this week in northern Syria that the United States believes was likely carried out by Islamic State, US officials said on Friday.

An Islamic State group suicide bomber attacked a centre for Kurdish forces in the northern Syrian city of Raqa on Monday, killing four civilians and an anti-jihadist fighter, a monitor said.

Iranian security forces have detained 10 people suspected of links to a suicide car bomb attack this week that killed at least two policemen, police chief Hossein Ashtari said on Sunday.