Officers are not looking for anyone else in connection with the deaths of a woman and child who were struck by a train at a busy station, police have said.
Chief Inspector Jenny Gilmer, of British Transport Police, ruled out the involvement of a third party but said the deaths in Slough, Berkshire, are still being treated as suspicious.
The station has been closed since the incident shortly before 9.45am amid a heavy police presence.
Ms Gilmer said: "Officers were called to Slough railway station shortly before 9.45am following reports that two people had been struck by a train.
“Thames Valley Police and South Central Ambulance also attended the incident and a woman and child were pronounced dead at the scene.
“The incident is currently being treated as suspicious and our detectives have launched a full investigation.
“But they do not believe there was any third-party involvement at the station.”
She appealed for witnesses and anyone with information to come forward to police.
She added: ``This is a obviously a very tragic incident and our thoughts are very much with those affected.''