"Since signing of the Border Defence Cooperation Agreement (BDCA), Chinese troops, have on one occasion, violated the provision by tailing our patrol in Eastern Ladakh on June 2," Defence Minister Arun Jaitley said in reply to a written query.
"A protest was lodged against this violation in the flag meeting held on July 15," he said.
India and China signed the BDCA to maintain peace and tranquility along the Line of Actual Control (LAC) in October last year.
After signing the BDCA, the UPA government had warned that the pact was not a guarantee that incursions or transgressions would stop but would help in addressing issues along the border.
Replying to another query, the Minister said Navy's INS Shivalik was deployed for participation in International Fleet Review (IFR) and multilateral maritime exercise at Qingdao in China from April 20-25.