Rescuers in Nigeria on Wednesday raced to find survivors, two days after a high-rise building under construction collapsed and trapped scores of people in the commercial capital Lagos, as the death toll rose to 22, an emergency official said.

The United Nations has condemned atrocities uncovered in a joint investigation into the conflict in Ethiopia's northern Tigray region on Wednesday, a day after the country's government announced a nationwide state of emergency and called on citizens to take up arms against the advance of Tigrayan forces toward its capital.