The death of a person found near a railway station is not being treated as suspicious, police said.
It's understood the person was hit by a train.
Police and paramedics were called to Gatley railway station in Stockport at 1.45pm.
It followed a report of a 'casualty on the tracks', British Transport Police said.
The person was pronounced dead at the scene.
In a statement, British Transport Police said: "British Transport Police were called to Gatley railway station at 1.45pm today - Friday - following reports of a casualty on the tracks.
"Paramedics also attended, however sadly a person was pronounced dead at the scene.
"Officers are working to identify the deceased and inform their next of kin.
"This incident is not being treated as suspicious."
The force said no further details would be released until a next of kin was informed.
The tragedy resulted in the closure of all railway lines between Manchester Airport and Manchester Piccadilly throughout Friday afternoon and early evening.
Many services were cancelled.
Northern, TransPennine Express and Transport for Wales services were said to have been affected.
Transpennine Express said on its website: "Can customers please be advised that due to a person being hit by a train in the Gatley area, between Manchester Airport and Manchester Piccadilly, all lines are blocked."
The tragedy meant no trains were running to Mauldeth Road, Burnage, East Didsbury, Gatley, Heald Green, Styal and Manchester Airport railway stations.
Buses replaced trains and tickets were accepted on Metrolink.
All lines reopened at 4.40pm and services through Gatley resumed.
