Interior Minister Rehman Malik has said 37 accused of Youm-e-Ashur bombing in Karachi have been arrested and being interrogated. Talking to media after appearing before Accountability Court in NAB reference on Saturday, Malik said Tehrik-e-Taliban, Jundullah and al-Qaida were involved in Karachi bomb attack. He said the Boulton Market arson probe was underway and the culprits of the tragedy will be punished as per law. He said the Youm-e-Ashur blast was not a suicide bombing but sophisticated technology was used to detonate the bomb. He said the government will install closed circuit television cameras in Islamabad, Peshawar and Karachi for surveillance. The NAB court today granted the Interior Ministers appeal for relieving him to appear in court proceedings. The next hearing of the NAB reference will be held on February 12.