A massive explosion occurred in the northern Pakistani city of Sialkot on Sunday, news agency ANI reported citing the local media. The sound of the blast was reportedly heard near the cantonment area in the Punjab province . ARY News quoting ISPR said an accidental fire broke out at the Sialkot Garrison, but there was no loss of life. According to the ISPR, due to short-circuiting, an accidental fire broke out in an ammunition shed near Sialkot Garrison.