A disembodied human leg was found on the tracks between two Bronx subway stations over the weekend as cops seek answers on the gruesome discovery, authorities said. 

The body part was discovered just after 1 p.m. Saturday on the roadbed between the 167th and 170th Street stops on the No. 4 line, police said. 

The NYPD could not confirm Monday morning who the leg belonged to or how the single limb ended up in the subway system.

The leg was turned over to the city medical examiner’s office for further investigation, police sources said.