A Sunni Muslim man hangs up a poster with an image of senior intelligence official Wissam al-Hassan, in the Tariq al-Jadideh district in Beirut, October 20, 2012.

Protesters march in the Achrafieh neighborhood a day after a car bomb attack that killed Brig. Gen. Wissam al-Hassan and at least seven others in Beirut, Lebanon, October 20, 2012.

A protester carries a tire to add to burning tires used as a roadblock to protest the death of Brig. Gen. Wissam al-Hassan in a car bomb attack, in the southern port city of Sidon, Lebanon, October 20, 2012.

Women walk through a road block of burning garbage containers laid by Sunni protesters angry at the killing of Brig. Gen. Wissam al-Hassan in Beirut, Lebanon, October 20, 2012.

Lebanese soldiers and security personnel walk in rubble after an explosion in central Beirut, October 19, 2012.

A Lebanese rescue worker, center, helps an wounded man at the scene of an explosion in Beirut, Lebanon, October 19, 2012.

Firefighters extinguish fire at the scene of an explosion Beirut, Lebanon, October 19, 2012.

Lebanese rescue workers and civilians carry a wounded man from the scene of an explosion in Beirut, Lebanon, October 19, 2012.

Lebanese Red Cross and civil defence personnel work at the site of an explosion in central Beirut, October 19, 2012.

Lebanese soldiers inspect damaged buildings at the scene of an explosion in Beirut, Lebanon, October 19, 2012.

Firefighters try to extinguish a fire as a car burns at the scene of an explosion in Ashafriyeh, central Beirut, October 19, 2012.