Police in a Boston suburb have arrested a man who they say entered a courthouse while wearing a gas mask and tactical gear ...

COPS are hunting for a "masked man" who reportedly released gas on trams full of passengers. Tram users were left scared after the gas mask-clad man reportedly discharged a mystery gas on board ...

Passengers have complained of a man in a gas mask unleashing a noxious substance on several trams, as people report hearing a “hissing” noise. Passengers on services on the Metrolink in Bury ...

A person on Facebook said: 'Last night on my way home from work on the Metrolink from Market Street to Bury, a man got on the back of the crowded tram wearing an industrial grade gas mask wearing ...