AT least 20 people were killed and 96 were injured after a suicide bomber detonated his vest inside a mosque in Pakistan. The explosion caused the building’s roof to collapse as some 150 worshipers including many policemen from nearby police offices were praying inside. AFPAt least 20 people were killed in the explosion on Monday[/caption] A survivor, 38-year-old police officer Meena Gul, said he was inside the mosque when the bomb went off adding he could hear cries and screams after the bomb exploded. Rescuers scrambled trying to remove mounds of debris from the mosque grounds and get to worshippers still trapped under the rubble, police said. Khan said several of the wounded were listed in critical condition at a hospital and there were fears the death toll would rise. Prime Minister Shahbaz Sharif in a statement condemned the bombing and ordered authorities to ensure the best possible medical treatment to the victims. He also vowed stern action” against those who were behind the attack. Former Prime Minister Imran Khan also condemned the bombing, calling it a terrorist suicide attack” in a Twitter posting. He wrote: “My prayers & condolences go to victims families. “It is imperative we improve our intelligence gathering & properly equip our police forces to combat the growing threat of terrorism.”