Three men have been arrested on suspicion of firearms offences following a National Crime Agency operation in Hailsham, East Sussex.
The men were detained by officers from the NCA's Armed Operations Unit on an industrial estate off the Hailsham by-pass.
Two firearms were recovered at the scene.
All three men are now in custody.
NCA and Sussex Police officers are working together at the location, which is cordoned off, as the investigation continues.