Riot police on the Greek island of Lesbos fired tear gas on Wednesday to disperse hundreds of stone-throwing protesters angry over the creation of a new detention centre
An air strike hit a detention centre for mainly African migrants in a suburb of the Libyan capital Tripoli late on Tuesday, killing at least 44 people and wounding more than 130, the United Nations said.
Prisoners rioted and seized weapons at a detention centre in South Sudan's capital Juba early on Sunday, a security source and local residents said.
Libya is a major departure point in North Africa for migrants crossing the Mediterranean Sea to Europe, mainly from other parts of Africa.
Australia and Papua New Guinea have agreed to close a controversial Australian-funded asylum seeker detention centre on Manus Island, although the ultimate fate of 800 refugees held in the camp remains unclear.