A local court had issued a non-bailable arrest warrant against the accused Bashir Ahmad Dar, a resident of Bumhama, a police spokesman said.
"A police party headed by a Head Constable was deputed to implement the court orders and arrest the accused, a former militant. Police traced the accused hiding in a house at Kawari village.
"When the police party reached the house, the accused lobbed a grenade on them, resulting in injury to a constable," the spokesman said.
