Twelve Congolese soldiers were also killed in a joint military operation against rebels in Congo’s northeast, which is facing a deadly Ebola outbreak, according to the Security Council.
The Security Council’s unanimous decision came after a thaw in relations between Eritrea and its neighbor Ethiopia.
The Islamic extremist group the Shabab claimed responsibility.
One of the buses tried to pass two large trucks on a stretch of the road where overtaking is prohibited, an official said.
Charles Trumann Wesco, a missionary from Indiana, was shot in the head during fighting between armed separatists and soldiers.
The bus left the road, rolled down a slope and crashed, ripping off the roof. A police official said the bus was not licensed to operate at night.
It was the second significant attack on district headquarters in Mogadishu, the capital, this month. The Shabab have claimed responsibility for both attacks.
José Eduardo dos Santos, 76, the former president of Angola, stepped down from the leadership of the governing party.
The attacker tried to speed through a checkpoint in Mogadishu but was stopped by security forces, the police said.
Spain’s Civil Guard said 600 crossed into Ceuta, adding a pressure on the country’s authorities in dealing with a wave of migration.