(Adds police comment on bomb search)
OSLO, July 17 (Reuters) - A Ryanair aircraft flying from London to Norway landed safely at Oslo's main airport on Friday after receiving a bomb threat in the air, but no explosives were found and a suspect was arrested, Norwegian police said.
Danish F-16 military aircraft scrambled to escort the plane to Norway, The Danish Defence Command said on its Twitter account.
The police arrested a 51-year-old British man on suspicion of being behind the threat, the police said in a statement.
A bomb squad that examined the plane found no explosives, the police later told Norwegian daily VG.
There were 142 passengers on board the Boeing 737-800 aircraft, and an undisclosed number of crew members, a senior police official told Norwegian media.
"Crew on a Ryanair flight from London Stansted to Oslo today discovered a note that claimed there was a potential security threat on board," a Ryanair spokeswoman said in an email to Reuters.
"The captain followed procedures and continued to Oslo airport where the plane landed safely. Customers remained on board while authorities carried out a security search," she added. (Reporting by Victoria Klesty and Nikolaj Skydsgaard Additional reporting by Conor Humphries in Dublin Editing by Hugh Lawson, Jon Boyle and Frances Kerry)