A doctor and a chemical engineer, both from Pakistan's heartland Punjab, have been found to be the masterminds of a deadly attack on spy agency ISI's provincial headquarters in Lahore last year. While the engineer, named Asif, from Lahore's prestigious University of Engineering and Technology has been nabbed, the doctor identified as Maaz is still absconding and is believed to be harbouring with Tehrik-e-Taliban militants in South Waziristan. According to officials, Asif was also involved in the March 2008 attack on the Federal Investigation Agency office in Lahore that killed 28 people. <br/><br/>Thirty-five people, seven of them ISI officials, were killed when four militants stormed the spy agency's provincial headquarters and detonated an explosives-laden van outside the building in May last year. Law enforcement agencies have taken a few of Asif's accomplices into custody from different areas of Punjab province. They were identified as Samiullah from Nankana Sahib, Imran from Lahore and Zafar from Khanewal.