Yemen`s Houthi rebels say a US airstrike has killed 68 people in a prison holding African migrants. The US military had no immediate comment, writes The Telegraf.

The alleged strike in Yemen`s Saada governorate, a stronghold for the Houthis, is the latest incident in the country`s decade-long war in which African migrants from Ethiopia and other countries who have risked crossing Yemen for a chance to work in neighbouring Saudi Arabia have died.

It is also likely to renew questions from activists about the US campaign, known as "Operation Rough Rider", which has been targeting the rebels as the Trump administration negotiates with their main benefactor, Iran, over Tehran`s rapidly advancing nuclear programme.

The US military`s Central Command, in a statement early on Monday before news of the alleged strike broke, sought to defend its policy of offering no specific details of operations. The airstrikes have caused controversy in the US over the defence secretary Pete Hegseth`s use of the Signal messaging app to post sensitive details about the attacks.

"To preserve operational security, we have intentionally limited disclosing details of our ongoing or future operations. We are very deliberate in our operational approach, but will not reveal specifics about what we`ve done or what we will do", - Central Command said.

It did not immediately respond to questions from the Associated Press about the alleged strike in Saada.