The fire investigation at Heathrow Airport is being conducted by the counter-terrorism unit.

A fire that caused the closure of Heathrow Airport on Friday is under investigation by the Metropolitan Police's counter-terrorism unit, despite no evidence of sabotage. The Met has stated that due to the incident's impact on critical national infrastructure, it is necessary for the Counter-Terrorism Command to conduct the inquiry.

The police force has indicated that they are keeping an open mind regarding the incident and are well-equipped to conduct a swift investigation with the specialized unit's extensive resources and capabilities. The Met is collaborating with London firefighters to determine the cause of the fire. Meanwhile, Energy Minister Ed Miliband confirmed on Friday that there were no signs of sabotage related to the fire, and the investigation into the incident, which significantly disrupted airport operations, is ongoing.