At least 20 persons were killed and many others wounded in a suicide attack in an Imambargah during a religious congregation on Sunday. According to early reports at least 20 persons were wounded in a blast in an Imambargah during a religious congregation in Chakwal on Sunday. According to reports it was a suicide attack as two motorbike riders blew up themselves when a Majlis was being held in the Imambargah in Sar Pak locality in the centre of the town. At least 20 persons were critically wounded in the terrorist attack, while no deaths yet confirmed in the incident. The injured were being transferred to hospitals. Police have cordoned off the areas. Emergency has been declared in local hospitals, while ambulances transferring injured persons and bodies to the hospitals. According to reports it has been the first incident of suicide attack in Chakwal. According to earlier reports a loud blast rocked Chakwal.