UN condemns deadly air strike on Yemen prison

The UN has condemned an air strike on a Yemen detention centre that has killed more than 70 people.

The facility in Saada, a stronghold of the rebel Houthi movement in north-western Yemen, was hit on Friday.

UN Secretary General Antonio Guterres said in a statement that the "escalation needs to stop".

In a statement on Saturday, the Saudi-led coalition fighting Houthi rebels in the country denied it had carried out the air strike.