Police said they are researching yet it was misty who was behind the impact in Trenz town in the southern Kashmir valley.
"Ten of them (admirers) were harmed, four have been moved to a doctor's facility in Srinagar," said Altaf Khan, director of police for the territory.
An overseer grabbed a steel glass containing the projectile left in the mosque's grounds, setting off the blast as admirers were leaving the building after petitions to God, Khan said.
Security has been fortified crosswise over Kashmir in front of festivities for Autonomy Day.
AFP