Authorities locked down Farringdon Station in London after passengers reported an unknown substance and a chemical smell on a platform, prompting 14 people to be treated and two hospitalised as a precaution.

Emergency services were dispatched shortly after the incident began and the scene was declared safe later in the morning once checks showed no elevated readings.

The British Transport Police confirmed their presence, with an evacuation carried out as inquiries proceed.

The closure affected inbound and outbound services, with passengers urged to seek alternative travel arrangements until the situation is resolved.

Officials said the incident was ongoing and that further updates would follow.

Train services through Farringdon were halted, with Thameslink services between London Blackfriars and London St Pancras suspended until further notice, isolating Farringdon and City Thameslink from rail links.

Farringdon’s status as a high-traffic hub underscores the potential scale of disruption, given its prominence among thousands of stations.

Historical context notes Farringdon’s heavy recent usage, though the focus remains on the day’s gas-leak-like incident and its transit impact.

National Rail stated emergency services had completed their work and lines were reopened, but major disruption was expected to continue through the day.

Eyewitness accounts described confusion and a heavy police presence, with officials providing limited information to commuters during the incident.

The incident disrupted travel plans and authorities offered guidance on alternative routes and stations for affected travelers.

Passengers were advised to use alternative stations such as City Thameslink (Holborn exit) or London St Pancras International while emergency services were on site.