New Delhi, Nov 03 (ANI): India beefed up security after a blast took place on the Pakistan side of the Wagah border which killed at least 55 people including women and children and as many as 70 sustained injuries. Hundreds of people visit Wagah border crossing near the Pakistani city of Lahore to witness the flags of both countries being lowered just before sunset. Bakshi also said the explosion could have happened on this side of the border as well, and that with the winters approaching the ceasefire violation may increase along the border. Media reports earlier said the explosion was caused by a gas cylinder but later police said it was probably a suicide bomber. Police probe is underway.