Afghanistan policeA relatively heavy explosion rocked Jalalabad city the provincial capital of eastern Nangarhar province.

A security official confirmed that the incident took place after unknown gunmen hurled hand grenade on the local radio station.

The official further added that incident did not incur any casualties to the civilians or media workers.

No group has so far claimed responsibility behind the incident.

The anti-government armed militant groups are actively operating in a number of its districts and often carry out insurgency activities.

Militants belonging to the Taliban group and the loyalists of the Islamic State of Iraq and Syria (ISIS) terrorist group are among the insurgents conducting attacks in this province.