Eight people were killed and more than 20 hurt in a bomb explosion at a roadside restaurant in the Model Town area on the outskirts of Islamabad on Tuesday. About 3.5 kilogrammes of explosives were used in the device planted at the eatery situated near Yamaha Chowk in the Hummark area, officials from the Bomb Disposal Squad told Geo News. The blast, which initially appeared to be a gas cylinder explosion, created a one-foot-deep crater, the channel reported. Most of the victims were labourers and drivers. Police from the nearby Sihala Police Station dashed to the scene and shifted the wounded and the dead bodies to Polyclinic Hospital and Pakistan Institute of Medical Sciences (PIMS). Before the Bomb Disposal Squad filed its report, Superintendent of Police Kamran Adil, the local police in-charge, told reporters that evidence was being collected from the scene and that the police were not clear what had caused the explosion. He said any subsequent findings would be shared with the media. Hotel owner Raaz Wali had denied reports of it being a gas cylinder explosion saying he used kerosene stoves for cooking. Eyewitnesses said it was a terrorist act and claimed that they had seen a child placing a bag under a chair. Officials at PIMS confirmed receiving three bodies. Additional Commissioner Rana Akbar Hayat confirmed the death of four people.