Mystery surrounds origin of human leg found on New York subway

Disembodied limb recovered from track bed of 4 line in the Bronx in latest troubling incident on mass transit system

New York's mass transit experience took a grisly turn over the weekend when a disembodied human leg was found on the 4 line between 167th and 170th streets in the Bronx.

Detectives are trying establish who the limb belongs to and how it got on a subway track bed. The city's medical examiner later took possession of the leg to find out more about its origins.