ISLAMABAD: An explosive device buried on the edge of a road outside the Pakistani capital Islamabad detonated Sunday, wounding three men, police said.

The blast happened near Malpur village, just outside the city.

“It seems to be an old explosive device buried long ago under the bush and garbage,” senior police official Bani Amin told reporters.

“A father and his son riding a motorbike and a man travelling in a car were wounded in the blast,” Amin said.

“The bomb disposal staff have collected some material from the blast site and are investigating. It could be an old hand grenade or a cracker,” he added.