Armed police have flocked to Terminal 3 this morning (December 7), with paramedics and firefighters also in attendance.
The exact nature of the incident is unclear at this stage, and we have approached the emergency services for more details.
Police, paramedics and firefighters have been dispatched to the airport (Image: @VivoPaella)
The Elizabeth line has reopened to customers after it was initially shut in response to the incident.
Pictures taken from the scene have captured just part of the emergency service response at Heathrow Airport.
Armed police officers have been captured on video walking through a car park, and weaving in and out of stationary traffic.
We await further details of the nature of the incident (Image: @VivoPaella)
RELATED: LIVE updates as armed police respond to ‘incident’ at Heathrow Airport
A road closure is in place on the nearby M4 Spur Road, also believed to be connected to this incident.
Traffic on the M4 inbound from junction for to Heathrow Airport has been described as “stationary” by the AA.
Both Heathrow tunnels were closed this morning, but TfL has since reported that the Heathrow vehicle tunnel has reopened.

