Two off-duty police officers tackled a drunken man on a late night Tube believed to be carrying a knife and gun with ammunition.
Frightened passengers on the District Line train pulled the emergency alarm cord as the train travelled near Earl’s Court station at around 12.30am on May 14.
The two Metropolitan Police officers were on the train and went to the carriage and dealt with the man, who was allegedly carrying the weapons in his luggage.
A 35-year-old from Ealing was arrested on suspicion of possession of a firearm with intent to cause fear of violence, possession of a firearm while drunk in a public place, possession of a bladed article, and possession of ammunition in a public place.
British Transport Police (BTP) said the man was interviewed and released on police bail until June 8, on condition he does not enter the transport system with any items which fall within the Firearms Act.
It has also launched a full investigation into the incident.
Anyone with information is asked to contact BTP on 0800 405040 or text 61016 quoting reference 34 of 14/05/16.
Earl's Court station was not one of the 12 'red stations' named in March as potential Night Tube danger hot spots .
However, according to Transport for London (TfL) , there has been an increase in the number of reports and arrests of unwanted sexual behaviour across the transport network.