It said zero infiltration has been reported by the Coast Guard since November 2012.
In a written reply, Defence Minister Manohar Parrikar said surveillance and patrolling along the coasts is carried on in accordance with threat perception and security needs.
Further, the coastal security apparatus in the country is reviewed from time to time.
"Marine commandos remain in a high state of readiness for immediate deployment to counter infiltration through sea routes. Quick Reaction Teams (QRTs) are maintained round the clock for emergency and anti-infiltration operations," he said.