New Delhi: The Canadian High Commission surely needs a lesson in diplomacy. It first called the Border Security Force (BSF) a "notoriously violent force" and now it turns out it claimed the Intelligence Bureau is involved in terrorism.

CNN-IBN learns the High Commission in New Delhi rejected the application of a retired Intelligence Bureau (IB) officer, who had applied for a temporary resident visa to visit his son who is settled in Canada.

The High Commission told the former officer, who held the rank of deputy director, in March 2010 that the IB is involved in terrorism and also snoops around.

The Union Home Ministry, which oversees the IB, has lodged a strong protest and called the High Commissionís comments discriminatory. The matter is now with the External Affairs Ministry. "Immigration will get back to you, as it falls under their responsibilities," said a spokesperson for the Canadian foreign minister when asked to comment on the High Commission's comments.