The Indian Coast Guard is expecting some concrete information on its missing Dornier aircraft with a submarine joining the search operations.

The Coast Guard also refuted television reports of the aircraft being located under water.

"The submarine (INS Sindhudhavaj) has started its search in the area where the aircraft is suspected to have fallen," a Coast Guard officer said.

"Late Sunday evening we should get some information on the missing aircraft. The television reports of locating the aircraft underwater are totally wrong," he added.