Three people have died after being struck by a train near Loughborough Junction station in south London.
The deaths are being treated as “unexplained” and police said they were investigating how they came to be on the tracks.
Emergency services were called to the station, near Brixton, at about 07:30 BST to reports of multiple bodies.
The three were pronounced dead at the scene, and it is understood that spray cans were found near their bodies.
Police have not confirmed if the three victims are men or women.
Det Supt Gary Richardson, from British Transport Police (BTP), said his “thoughts are with the family and friends of these three people”.
“My team are now working hard to understand what happened and how these three people came to lose their life on the railway,” he added.
He asked anyone who was near the station on Monday morning or “saw something which they think might be relevant” to contact police.
It is believed the victims could have been struck overnight, when freight trains carry out a lot of the infrastructure work on Britain’s railways as the passenger pathways are clear.
Police officers remain at the scene where they are working to identify the deceased and inform their families.
The station remains open, but BTP warned that train services will be delayed while inquiries are carried out.
Network Rail said it was “assisting the British Transport Police as they investigate an incident at Loughborough Junction this morning”.
London Ambulance Service said it was called to the station just before 09:00.
“We sent a number of ambulance crews but sadly three people were found dead at the scene,” a spokesperson added.
Rail regulator the Office of Rail and Road has opened a preliminary investigation.
Loughborough Junction is an elevated station managed by Thameslink and located on a line between Herne Hill and Elephant and Castle stations.
It is near three other lines used by trains which do not stop at the station.