LONDON (AFP) - Prime Minister Gordon Brown said Monday the British public would give Prince Harry the "benefit of the doubt" over a video showing him calling army colleagues "Paki" and "raghead." Brown said the 24-year-old royal, who is third in line to the throne, knew his language was unacceptable and his apology was sincere. But the father of Ahmed Raza Khan, the Pakistani soldier who Harry called "our little Paki friend", was reported as saying he could not accept the apology, and that Harry should say sorry to the Islamabad government. The News of the World newspaper on Sunday published the video clips made by Harry in 2006 while he was an army officer cadet. The prince's office said Harry was extremely sorry for any offence caused. "The sincerity of his apology cannot be doubted," Brown told GMTV television on Monday. "It was a mistake, he has made the admission of that and, once he has made his apology, I think the British people are good enough to give someone who has actually been a role model for young people and has done well fighting for our country, gone into very difficult situations with bravery, I think they will give him the benefit of the doubt. "I think Prince Harry knows that these comments are unacceptable ... These comments have no part in our life." The Ministry of Defence said the prince's commanding officer would look into his remarks. However, there will be no formal investigation. Despite trying to shake off his "playboy prince" image through charity work and military service in Afghanistan, Harry has repeatedly found himself in hot water for his comments and antics " most infamously for wearing a Nazi uniform to a fancy dress party. The latest embarrassing footage was recorded as Harry was waiting with his platoon in an airport. Touring the departure lounge with a video camera, he spots Khan and says: "Anybody else around here?... Ah, our little Paki friend, Ahmed." "Paki" is a racist term for Pakistanis or other South Asians. Khan served with Harry at the elite Sandhurst military academy. Harry's grandmother Queen Elizabeth II presented him with the Overseas Sword for being the best foreign cadet in April 2006. A spokesman for the prince's office said: "Prince Harry fully understands how offensive this term can be, and is extremely sorry for any offence his words might cause." But speaking in Pakistan, Khan's father Muhammad Yaqoob Khan Abbasi said he was "very, very hurt" by the "disgraceful insult". "That word he used is a hate word and should never be used against any Pakistani," he was quoted as saying in the Daily Mail newspaper. "Prince Harry should apologise to the Pakistani army and to the Pakistani government for this. I cannot accept his apology unless they first accept his apology."