EMERGENCY services were called to the M1 after reports a body was found on the northbound carriageway.
They attended a section of the motorway near a bridge at Wales shortly after 3.20am today (Wednesday).
A police spokesperson said: “Extensive enquiries are ongoing to establish the circumstances and the carriageway is closed to allow those enquiries to take place.
“It is expected to remain closed for some time. The investigation is in its early stages and no further information is available at this time.”