A civilian and a policeman were injured on Monday in two separate grenade attacks by militants in the Kashmir Valley, police said.Militants hurled a grenade at a passing army vehicle at Drangbal near Pampore town on the highway but missed, and it exploded on the road, injuring a civilian passer-by, a police officer said. Another explosion took place when militants hurled a grenade at Baramulla Police Station in south Kashmir; the grenade exploded injuring a constable, the officer said