DHAKA: Dozens of people have been killed or injured in a blast outside a police college in the Yemeni capital Sanaa.

Security sources say, reports the BBC.

Reports said a car bomb had been detonated near a crowd of students, but this could not be confirmed.

Witnesses said the blast was heard across the city and a large plume of smoke was seen.

Yemen has been unstable since protests in 2011 forced then-president Ali Abdallah Saleh from office.

Photographs on social media purporting to be of the scene of the blast showed the wreckage of a vehicle and bodies lying on a pavement.

No group has so far said it carried out the attack in Sanaa on Wednesday.

However, Islamic militants belonging to al-Qaeda in the Arabian Peninsula (AQAP) have staged an increasing number of bombings and shootings across the country.

The insurgents have also seized parts of the country’s south and east.

BDST: 1245 HRS, JAN 07, 2015