UN condemns airstrike in Yemen that leaves more than 80 dead

Hundreds also wounded as Saudi-led coalition denies reports it bombed detention centre in Sa'ada

The UN has condemned an airstrike on a detention centre in northern Yemen as the death toll rose to more than 80.

The airstrike in the rebel-held Sa'ada province on Friday morning followed a Houthi drone attack on the United Arab Emirates on Monday that killed three people. It marks an intensification of violence in the seven-year civil war between the government, supported by a Saudi-led coalition, and the Iranian-backed rebels.