Ryanair (RYAAY) said Tuesday it was informed of a security threat on a flight from Faro, Portugal to Brussels South Charleroi airport in Belgium.

Portugal's official LUSA news agency described a fake bomb threat on board the plane.

The Brussels airport reported on its Facebook page that shortly before 11:00 a.m. local time, a "bomb threat" was triggered on board a plane that landed.

"A security perimeter was established around the aircraft, which required the closure of the runway and the suspension of operations," the airport said in the statement.

Ryanair said the aircraft landed "normally at Charleroi as planned" and passengers disembarked from the aircraft, which was being prepared to return to service.

As of 1:45 p.m. local time, the airport said the runway has been reopened and operations have resumed, although delays were possible throughout the afternoon.