The death toll continues to rise after a suicide attack in Pakistan's second largest city on Wednesday morning. About 30 people were killed and more than 250 others were wounded.

The police said the explosion in Lahore occurred outside the Police Emergency Services Office.

Officials say at least 9 police officers and several intelligence agents are among the dead.

The police have arrested two suspects at the site of the blast. And the Interior Ministry says the attack could be retaliation for the government's military offensive to rout Taliban militants from the northwestern Swat Valley.

Pakistani President, Asif Ali Zardari, and Prime Minister, Yousaf Raza Gilani, have strongly condemned the blast and ordered an inquiry.

(CCTV May 28, 2009)