One person was killed and 18 others were injured in a blast that ripped through an Imam Bargah here in Sargodha block 19, report said on Sunday. The injured, some of them severely, have been shifted to District Hospital Sargodha and announcements are being made to donate blood for the wounded. Emergency has been declared in city hospitals. Rescue and relief activities have been kick-started at the site of the incident while heavy contingent of police arrived at the scene and cordoned off the area. The blast occurred when preparations were being made for Namaz-e-Maghribain in the Imam Bargah located in a bustling market place.