Ugandan officials on Wednesday raided an HIV vaccine research facility in Kampala run by the U.S. Military and Makerere University, a spokeswoman for the Walter Reed Army Institute of Research confirmed to BuzzFeed.

At least one employee of the Makerere Walter Reed Project was detained, spokeswoman Debra Youric said, but it is not known whether this person was a Ugandan or U.S. citizen. Many other details remain unconfirmed, including what branch of law enforcement raided the facility and what materials may have been seized.

Following the raid, Ugandan activist Pepe Julian Onziema tweeted the facility was shut down for "conducting 'illegal homosexual research.'"