LAHORE, March 29, 2016 - A closed market is seen during the mourning day in eastern Pakistan's Lahore on March 28, 2016. Pakistani security forces have launched operations in parts of eastern Punjab province where a suicide bomber killed at least 72 people and injured 315 others at a crowded park, the army said Monday. Mourning day is being observed across the country against the Lahore suicide attack. (Xinhua/Sajjad)
People walk past a closed market during the mourning day in eastern Pakistan's Lahore on March 28, 2016.