Kabul, On thursday, Taliban suicide bombers attacked a convoy of buses carrying Afghan police cadets outside the capital Kabul.

At least 37 people and 40 injured in an incident, said officials.

An email sent by spokesman Zabihullah Mujahid in which the Taliban claimed responsibility for the attack.

The first suicide bomber struck two buses carrying trainee policemen, and a second attacker targeted those who rushed to the site to help and also hit a third bus, Paghman district governor Mousa Rahmati said. He said four civilians were among the 37 dead.

The cadets were returning to Kabul from a training centre in Wardak province when the convoy was targeted 20 km west of the capital.

The interior ministry put the death toll at 30 and said 58 others were wounded. It was not immediately possible to reconcile the different casualty figures.