Lahore - Supreme Court Bar Association (SCBA), secretary Raja Zulqarnain has demanded that the government should hold thorough investigation about involvement of Black Water or any other foreign security agency in Data Darbar blast. He condemned the element, which wanted to blame Punjabi Talban for this incident, to which he called a national tragedy. It is just to protect the culprits coming beyond the borders to disintegrate Pakistan. Addressing a press conference here on Wednesday, he said that legal fraternity had some serious doubts about connection of some foreign agencies in this tragic and inhuman act and even no Muslim could dare to think of blast at a holy place. He said that the government should put on record about presence of forces persons in Embassies of USA, UK, India, Afghanistan and others and their activities should be monitored. He said likewise, the details about staff of UN offices in Pakistan and their movements and other activities should also be watched. He said that the local agencies should also check the luggage container of foreign agencies coming to Pakistan. He said that some foreign forces wanted to hit countrys nuclear and other projects like gas pipeline from Iran and getting nuclear technology from China. He said that the people in power and other politicians should come with clear-cut stand on the security and foreign interference issues. Vice president SCBA Mian Waheed Akhtar and president Tax Bar Association Ajmal Khan also demanded action against foreign element, which had disrupted the peace in the country.