LONDON (AP) — Two men, including one who was reported to be a parliamentary researcher, were charged with spying for China, British prosecutors said Monday.

Police said Christopher Berry, 32, and Christopher Cash, 29, were charged with “providing prejudicial information to a foreign state, China.” They will appear at Westminster Magistrates’ Court on Friday.

Police allege the two men collected, recorded or communicated information “prejudicial to the safety or interests of the state” and violated the Official Secrets Act between late 2021 and February 2023.

“This has been an extremely complex investigation into what are very serious allegations,” said Dominic Murphy, head of the Metropolitan Police counterterrorism command.

Authorities did not release details about the two men. But Berry is reportedly an academic based in Oxfordshire, and The Sunday Times reported last year that Cash was a parliamentary researcher who held a pass that allows full access to the Parliament buildings, issued to lawmakers, staff and journalists after security vetting.