The British case against a Swedish man accused of terrorism offenses has collapsed after lawyers were unable to get sensitive information from the U.K. government.

The case against 37-year-old Bherlin Gildo ended Monday when prosecutors said there was no longer a "reasonable" chance of getting a conviction.

Gildo had been accused of getting terrorist training and weapons training in 2012 and 2013 and of possessing information likely to be useful to a terrorist.

He had been arrested in transit at London Heathrow Airport.

Prosecutor Riel Karmy-Jones said a careful review of evidence led to the case being dropped. She had said in earlier proceedings that "third parties" held information sought by defense lawyers.

Defense lawyer Henry Blaxland had said British security services held the needed information.