Gloucestershire Police confirmed that the Army’s specialist explosive ordnance disposal team are currently examining a number of vehicles.

RAF Fairford has been used to deploy U.S. bombers since Washington, alongside Israel, began operations against Iran on Feb. 28 — prompting protests outside the base.

In July, Iran’s Iran’s Islamic Revolutionary Guard Corps (IRGC) warned the U.K. that any British military base used by the US to launch attacks against Tehran would become a “legitimate target.”

This article is being updated.