QUETTA, Feb 26: Unknown persons hurled a hand grenade at the building of Radio Pakistan Quetta and a bomb exploded in the city on Saturday night.

According to police sources, a hand grenade exploded with a bang in the lawn of Radio Pakistan building around 9.20pm.

However, no causality was reported, police said, adding that the windowpanes of some rooms of the building were smashed in the explosion.

A pick-up owned by a Pashtu compere Nazir Hanawal was also damaged.

"The hand grenade was hurled in the lawn of the radio station from Habib Nullah close to the building," a senior police officer told Dawn. The officials of the local administration and police rushed to the site soon after the explosion.

"It was a powerful hand grenade that exploded in one of the lawns of the radio station and created a one foot crater," bomb disposal officials said.

Another explosion occurred near Railway Quarters at Zarghoon road around 9pm. Unknown persons used a local device along with timer for the blast, sources said.