Police in the UK mounted a massive operation involving armed officers and a helicopter and after a three-hour hectic chase managed to kill their target -- a runaway cow -- which posed a "significant risk" to motorists. Police in Northumbria area in northeast England deployed marksmen, aerial support and 15 to 20 cars, closing roads in a bid to keep three runaway cows off a busy road. Three cows escaped from the Rising Sun Farm in Wallsend, though two were later recaptured. However, the manager of the farm later said that it did not have any cows. "Three cows escaped from a field north of the Rising Sun Country Park," he said. "It is believed they were spooked by dog walkers and jumped over a fence."