PESHAWAR: Police arrested a Punjabi man here who was planning to blow up Corps Headquarters, security sources said on Saturday, a day after a suicide bomber killed two policemen in a Peshawar suburb. “He was picked up from near the office of the corps commander in the cantonment area and handed over to security agencies for interrogation,” the sources said. The suspect is from Gujranwala district of Punjab province and is said to be “mentally imbalanced”. The suspect told interrogators he wanted to blow up Corps Headquarter, but did not say what his motive was.