Surgeons in India remove 40 knives from inside a man who was suffering from a stomach ache in the Indian city of Amritsar. Report by Conor Mcnally. A team of doctors successfully removed 40 knives from a man's stomach in Amritsar, Saturday, after five hours of surgery. Surjeet Singh, a policeman, required five hours of surgery to remove the knives, which he said he had felt an 'urge' to eat.