Police in Britain have carried out two controlled explosions at a West Yorkshire farm during an investigation into the Real IRA.
Police have evacuated homes near a disused farm in Tingley near Leeds where firearms have reportedly been found.
They were searching the farm as part of an anti-terrorism operation thought to be linked to earlier arrests of six men.
A West Yorkshire police spokeswoman said: "The firearms operation we are conducting relates to searches being made as part of an ongoing inquiry being conducted by the Metropolitan Police.
"A number of roads in the Tingley area have been closed in order to safeguard members of the public."
Earlier five men were arrested after searches in Enfield, North London, and taken to Paddington Green police station for questioning.
A sixth man was arrested after searches in Liverpool. He's been taken to a local police station where he's being interviewed by Anti-Terrorist Branch officers.
They're all being questioned in connection with the Real IRA's 18-month bombing campaign.
PA