According to naval sources, the incident occurred around 11:50 AM when welding work was going on onboard the naval ship.
"During the welding work, the (welding) gun took time to ignite and when it did, thick flames erupted from the gun, injuring three people including two civilians," the sources said.
"It was a minor accident in which three people sustained burns. They have been taken to the naval dispensary for first said," the sources added.
INS Ganga was deployed for patrolling the Gulf of Eden in 2012 to protect the marine jurisdiction from the Somali pirates.