One person was killed and 20 injured when terrorists carried out a grenade attack in Doda town of Jammu and Kashmir on Sunday.

The town is in Udhampur constituency, where polling will be held on Monday.

The attack was aimed at the vehicle of a senior superintendent of police.

Four policemen were among those injured in the blast, which took place minutes after K N Suharwardy, the National Conference candidate for the seat, passed the area, sources said.