Suspected separatist militants in Indian Kashmir threw a grenade at a security bunker on a crowded street in the region’s main city on Tuesday, wounding at least a half-dozen people, police said. “The aim of the grenade was a security bunker, but it bounced back and exploded near a busy street crossing,” a police officer, who did not want to be named, said. No militant group claimed responsibility for the attack, which took place near Niad Kadal, a residential area in Srinagar.