British Transport Police are appealing for information after a bottle of hydrochloric acid was found on a Northern Rail train at Middlesbrough station shortly after 7 o'clock on Sunday evening.
The station was evacuated for a time and buses replaced train services.
4 fire appliances attended the incident along with 3 special appliances and 3 officers.It is believed the acid was in a soft drink bottle and caused the smell of burning when some of the liquid leaked from the container.
More top news
Research has revealed that Sunderland is ranked the fourth best place to be a sports fan in the UK, and the best in the North East.
Do you know someone who should represent ITV Tyne Tees at the Daily Mirror Pride of Britain Awards in London?
NFU Mutual has found the cost of rural crime in our region rose by a fifth last year, despite a decrease nationally.