From the Bristol Evening Post:
Bristol Parkway Station was evacuated by armed police in a security alert sparked when a passenger on a train joked that he was carrying a gun.
The incident happened yesterday morning on a London to Cardiff train and involved a 41-year-old man heading to Bristol with more than ú8,000 in cash to buy a car.
The train was in the Didcot area when the man made his way to the buffet car to buy refreshments, police said.
A member of staff at the buffet noticed his wallet was stuffed full of ú50 notes and when she remarked on it he told her he was also carrying a gun.
The woman then alerted British Transport Police, who closed Bristol Parkway Station for about an hour.
Armed police and a helicopter unit from Avon and Somerset also attended and the man was arrested and later cautioned.
Transport police spokesman Brian Price said: "A 41-year-old man was arrested at Bristol Parkway Station on suspicion of money laundering on Friday, September 11. He has since been released without charge.
"The man sparked a security alert on board the 10.15am London Paddington to Cardiff service after he indicated to a member of train staff that he was in possession of a firearm.
"He was also carrying a large quantity of cash, which also aroused suspicions.
"Police were alerted at 11.02am and officers from BTP, assisted by armed officers from Avon and Somerset police, detained the man when the train arrived at Parkway shortly after midday. The station was closed for a short period of time."
Sergeant Mark Harris said: "The man was arrested on suspicion of money laundering but when interviewed it emerged he was legitimately carrying more than ú8,000 to buy a car in the Bristol area and no weapons were found.
"He apologised for making a flippant comment, which led to armed police clearing the station.
"He was cautioned for a railway by-law offence for interfering with the comfort of fellow passengers."