Delhi Chief Minister Arvind Kejriwal on Thursday condemned the grenade attack in Jammu that killed one man and said a united India will defeat terrorism."I strongly condemn the grenade attack at Jammu Bus Stand. I pray for the speedy recovery of the injured. Terrorism will be strongly fought and defeated by a united India," the Aam Aadmi Party leader tweeted.One person was killed and 30 others were injured when a militant threw a grenade that rolled under a packed parked bus in Jammu's main bus stand and exploded.