Two female suicide bombers killed three civilians and wounded eight in a suspected Boko Haram attack in northeast Nigeria, emergency services said Wednesday.

A Taliban fighter driving a Humvee packed with explosives blew himself up outside a police headquarters in the northern Afghan city of Pul-e-Khumri and other fighters opened fire on security forces there

President Hassan Rouhani vowed revenge on Thursday against the "mercenary group" behind a suicide bombing which killed 27 troops in southeastern Iran and accused the US and Israel of supporting "terrorism".

A suicide bomber blew himself up inside a packed mosque on an Afghan army base during Friday prayers, killing at least nine soldiers, officials said, in the latest bloody violence to rock the war-torn country.

A suicide attacker killed at least three people on Saturday by detonating explosives near the office of Afghanistan's election commission in the eastern city of Jalalabad, where dozens of protesters had gathered, an official said.

A suicide attack on Saturday in Southwest Pakistan targeted a bus carrying Chinese engineers, wounding at least five people including two Chinese nationals, officials said.

A Russian court on Thursday jailed a teenaged supporter of the Islamic State jihadist group over a plot to carry out a suicide attack at Saint Petersburg's Kazan cathedral.

At least 28 people were killed and 35 wounded in a suicide attack on a polling station in the southwestern Pakistani city of Quetta, as millions voted in a nationwide election on Wednesday.

The health ministry warned the latest toll, which initially had been 14 dead and 60 wounded, could change.

At least five people were killed and six others injured in a night-time Boko Haram raid and suicide attack on a village in northeastern Nigeria, residents told AFP on Saturday.

Libya's health ministry said on Thursday that the death toll from the suicide attack against the headquarters of the electoral commission in Tripoli a day earlier had risen to 14.

A group of militants including suicide bombers stormed the head offices of Libya's electoral commission in Tripoli on Wednesday, killing at least 12 people and setting fire to the building, officials said.