Emergency services are responding to an incident in the parking lot of Heathrow Airport in London, the airport said in a Sunday statement to X/Twitter.
The incident occured at Terminal 3 and is 'not terror-related,' BBC reported.
"Passengers are advised to allow extra time when traveling to the airport and to check with their airline for any queries," the statement continued.
The incident sparked a large presence of armed police, along with people being told to stay in their cars, according to social media reports.
This is a developing story.