Gunmen killed at least seven people and wounded 14 others in an attack on a bus driving towards a Coptic Christian monastery in Egypt on Friday, the Archbishop in Minya said.
An active shooting incident in the area of a Pittsburgh synagogue on Saturday resulted in "multiple casualties," a police commander said.
Thursday's attack took place between the towns of Zliten and Khoms on the coastal road leading from Tripoli to the port city of Misrata.
Gunmen set off at least three explosions in the Afghan capital, Kabul, on Wednesday and then battled the security forces from buildings they occupied in the latest in a spate of violence to rock the city.
Gunmen on Wednesday killed four paramilitary policemen in an ambush in Pakistan's restive southwestern province of Balochistan, officials said.
Gunmen on pick-up trucks and motorcycles coming from Mali killed 13 gendarmes and wounded five more in an attack on their base in western Niger, security sources said on Saturday.
Several students have been injured in Kenya after gunmen opened fire at the Technical University of Mombasa's campus in coastal Kwale county.
Gunshots and explosions could be heard during the attack that lasted around four hours and witnesses reported seeing worshippers smash windows to escape.
Gunmen on Wednesday shot dead four members of the Shia Muslim minority in Pakistan's southwestern province of Baluchistan, officials said, in what police suspect was a sectarian attack.