Two men found seriously injured on railway track outside Birmingham New Street Station are believed to have fallen from a nearby bridge.
British Transport Police (BTP) said the men's multiple injuries were 'believed to be consistent with a fall from height' after they were discovered badly hurt by the north end of the station.
Officers are now treating the incident as 'non-suspicious', adding there was 'no third-party involvement'.
Earlier, officers had been searching for clues around a bridge which runs over the track.
West Midlands Ambulance Service said it had been called out to 'two men who had reportedly fallen from a bridge' near the station.
A police spokesman said: "Officers from BTP West Midlands attended Birmingham New Street Station after reports of two men on the railway line.
"Medics attended and administered first aid to the men at the scene."
He added: "Both men's injuries are believed to be consistent with having fallen from height - no third-party involvement, no suspicious circumstances.
"Both are still in hospital for injuries which are still described as serious."
The incident meant some Arriva Trains Wales, CrossCountry and London Midland rail services were running with delays up to 20 minutes, according to National Rail Enquiries.
Network Rail said normal running had resumed but cautioned rail passengers to expect some residual delays between Birmingham and Wolverhampton.