Islamabad, March 4 (IANS) At least 40 people were killed and 135 others injured when twin blasts hit a residential area in Pakistan's port city of Karachi Sunday night, officials said.
The blast took place around 7 p.m. at Abul Hassan Isphahani road of Karachi, the capital city of Sindh province, Xinhua reported.
Aftab Khatri, health secretary of Sindh province, told Xinhua the toll may rise as many of the injured, including a large number of women and children, were in a critical condition.
Karachi Police official Fayyaz Khan said the first bomb was triggered off by a remote-controlled device. Explosive materials were placed in a mini-truck parked near the entrance of the residential Iqra City area of the metropolis.
He said the bomb disposal squad was investigating the nature of the second blast.
According to initial reports, the second explosion was carried out by a suicide bomber who blew himself up in the area.
Fayyaz said an estimated 150 kg of explosives were used in the blasts.
The bomb also lethal chemicals that led to a huge fire after the explosions.
The blast destroyed two multi-storeyed buildings comprising 200 flats. Many people are believed to be trapped under the rubble.
Following the blasts, several vehicles and over 150 shops caught fire.
The injured were taken to Abbasi Shaheed Hospital, Patel hospital and Jinnah Hospital.
No group has claimed responsibility for the blasts.
President Asif Ali Zardari and Prime Minister Raja Pervez Ashraf condemned the blasts and directed the hospitals to provide best possible medical treatment to the injured.
A one-day mourning has been announced in the province Monday. The national flag would fly at half-mast on all state-owned buildings across the province.