DARA ADAMKHEL, March 28: A bomb went off inside a public call office in the Dara bazaar on Tuesday night, partially damaging several shops, eyewitnesses said. They said the explosion took place in the Humayun public call office, rocking the entire town. The explosion damaged three shops in the locality. Officials said that anti-tank mines had been used in the explosion. The owner of the call office was wounded severely early this month when unidentified persons had shot at him.