Suicide bombing kills at least 22 in Yemen

At least 22 people were killed in a suicide bombing at a police academy in the Yemeni capital Sanaa on Wednesday, an attack police investigators said bore the hallmarks of al-Qaida.

Medics said dozens of people were also injured in the attack, which appeared to have been timed to coincide with the cadets leaving the academy at the end of the school day.

Witnesses said police closed the scene of the attack and began investigating the blast as ambulances ferried casualties to a hospital.