Slough station deaths: Mother and son killed by train
A mother and her 10-year-old son were killed when they were hit by a train in Slough, Berkshire.
British Transport Police said the deaths were being treated as suspicious, but no third party was being sought.
They said the possibility of a murder-suicide was "one of the lines of inquiry" officers would be pursuing.
A South Central Ambulance crew pronounced the two dead after being called to the scene at 09:45 BST.
During a lunchtime news conference outside Slough station, Ch Insp Jenny Gilmer said: "The incident is currently being treated as suspicious.
"Our detectives have launched a full investigation but they do not believe there was any third party involvement at the station."
Emergency services and forensics officers blocked off two of the four lines in and out of London Paddington at Slough for six hours, causing severe train delays and cancellations.
All lines were later reopened.
A First Great Western spokeswoman said at 18:00 BST that a normal service was now running.
The train that hit the mother and son, the 08:41 from Bedwyn, was able to resume its non-stop service to Paddington just after 13:00.
Dan Paynes, a spokesman for First Great Western, said the driver of the train was replaced at Slough.
"He is receiving all the support he needs and probably won't drive again for some time," he said.
Passengers had earlier been kept on the train while investigations were carried out.