cnn pakistan

(CNN)A blast in Pakistan's southwestern city of Lahore has killed at least 50 people, a health official told CNN.

Some 200 others were injured, health adviser for Punjab province Khawaja Salman Rafique said.
The explosion happened at the city's Gulshan Iqbal Park.
Pakistani Prime Minister Muhammad Nawaz Sharif strongly condemned the blast, expressing grief for the victims.
No group immediately claimed responsibility for the explosion.