The attack comes a day after militants targeted telecom facilities by carrying out three grenade attacks here.
A police officer said that militants hurled a grenade in Achabal Bus stand around 2 PM, causing splinter injuries to two pedestrians.
He said the target of the grenade attack was apparently a patrol party of security forces but the device missed the intended target and exploded on the roadside.
The whole area has been cordoned off and a hunt has been launched to nab the militants, the officer said.
Yesterday, four persons were injured in the series of attacks aimed at mobile telecommunication facilities here.