More than two dozen people at London City Airport were sickened Friday after a report of a "chemical incident." Authorities responded and evacuated the facility but no source of the illnesses was immediately found. Photo courtesy London Fire Brigade/FB

LONDON, Oct. 21 (UPI) -- One of London's airports was evacuated for a short time Friday after several passengers became abruptly ill and police feared a possible chemical leak.

Emergency personnel responded to a report of a "chemical incident" at the London City Airport Friday afternoon. At the airport, medics treated more than two dozen people who had difficulty breathing.


Authorities decided that, as a precaution, it was best to evacuate the facility, which is located about 25 miles east of Heathrow International Airport.

No chemical leak was found and officials are still investigating the cause of the passengers' sickness.

London City Airport is a growing facility that caters largely to business travelers. It handled more than 4 million passengers in 2015.