KABUL: At least six people were killed and 16 more wounded in a suicide blast outside a military academy in the Afghan capital on Thursday, an official said.

The attack, which was claimed by the militant Islamic State group, targeted students leaving the Marshal Fahim National Defence University in western Kabul.

Kabul police spokesman Firdaws Paramarz said the suicide bomber had been on foot. He blew himself up when a soldier challenged him near the entrance to the war college.

`In the blast, 16 people were wounded and six were martyred,` Faramarz said.

The attacker `detonated himself before reaching his target`, he added, without providing further details.

The attack happened around noon (0730 GMT), a time when students typically leave school early during the month of Ramazan.

The Afghan IS affiliate said it had carried out the attack and claimed to have killed `50 military trainees`.

Opened in 2005 and named after former vice president Mohammed Fahim, the Marshal Fahim academy is modelled after US and British war colleges and trains cadets destined to become officers in Afghanistan`s army.

A large annexe to the university is home to dozens of Nato troops who mentor the Afghan cadets.

The explosion was not believed to have af fected operations at that centre, which lies behind multiple layers of tight security.-AFP