Taipei, Sept. 22 (CNA) A 53-year-old mailman in Keelung City was bitten by a dog on Monday, severing the first joint of his right ring finger, according to local authorities. Police located the severed finger at the entrance of an alley, placed it in a plastic bag, and delivered it to the hospital. Animal protection officers later tranquilized the dog and took it to a pet shelter, according to the city's animal protection office. Director Chen Po-ting (陳柏廷) of the office said the dog was left unaccompanied in a public place, violating the Animal Protection Act. Chen said the dog is not a breed classified as "aggressive" by the Ministry of Agriculture, but because of the attack it will now be listed as an aggressive dog.