Bernie Ecclestone has said he was forced to surrender his shotgun and questioned by police at an airport in Portugal after failing to produce the relevant documentation.Ecclestone, who ran Formula One for nearly four decades from 1978 to 2017, arrived at Tires Aerodrome, a regional airport in Cascais, on Monday morning.The 95-year-old told The Athletic he had travelled with his shotgun and that he had passed through Customs and that everything was “perfect”, only to then be questioned by local police.“When I got out of Customs, somebody said the police would like to talk to you,” Ecclestone told The Athletic via a telephone interview. “Because I know the Customs people quite well, I said sure and went to see the police.“They asked if I had a gun here and I said yes. They then asked if I had all the documents for the gun and I then asked what documents.“They said there is a blue book that normally goes with the gun and I said I have never seen a blue book, and I don’t know what the documents are.”Ecclestone says he was questioned for around “30 to 45 minutes” and informed police that he had travelled with the gun to compete in a clay pigeon shooting competition, an activity he says he enjoys doing at home in Switzerland.After being questioned, the police, Ecclestone added, asked him to go back to Customs, where he was then instructed to surrender the weapon.