India on Tuesday said that Chinese helicopters violated its airspace in the Uttarakhand sector twice this summer.
Defence minister Arun Jaitley told Rajya Sabha that the Chinese choppers "transgressed the Line of Actual Control (LAC)" on April 30 and June 13.
New Delhi and Beijing had inked a new border pact last year to ensure peace and stability along the LAC but the cycle of transgressions continues.
The unresolved border issue came up for discussion during Indian Prime Minister Narendra Modi's first one-on-one meeting with Chinese President Xi Jinping on the sidelines of the BRICS summit at Fortaleza in Brazil. The meeting held on Monday was scheduled for 30-40 minutes but lasted 80 minutes.
A government official said Modi told the Chinese leader that there was a need to find a solution to the boundary question, and that the maintenance of peace and tranquility on the border was essential.
Jaitley told the House that India had lodged protests with the Chinese side regarding the transgressions at flag meetings on May 5 and June 23. He said transgressions occur due to differing perception of the LAC by both India and China.