New Delhi, Feb 21: A man has been arrested for stabbing his friend to death in the capital, police said on Monday.Ved Prakash stabbed Birju, 28, after a heated row on Sunday night in west Delhi s Sultanpur area. Ved Prakash and Birju, who were earlier involved in a case of Arms Act, were consuming alcohol with six friends. "When they reached the railway tracks at Sultanpur, Ved Prakash and Birju had an argument which turned into a fight," Deputy Commissioner of Police Rishipal said.Prakash attacked Birju with a knife over a dozen times. Prakash was taken into custody from a friend s house on Monday.