In the development that could be a new trend, militants had planted the grenade outside the mosque in Trenz locality of Shopian, 52 kms from here, in the wee hours.
"The grenade was kept on roadside in a steel glass after removing its pin. Someone touched it, triggering the blast," a police official said.
He said 10 civilians who had come out of the mosque after morning prayers were injured in the explosion.
While four of the injured were referred to a hospital in Srinagar for treatment, six others were admitted to a hospital in Shopian, he said, adding all the injured were in a stable condition.
"A bomb disposal squad was rushed to the spot and the grenade was destroyed on the spot without causing any loss," he added.