An American woman and a man from Belize have been killed in what appears to have been a dispute between drug dealers at a beach club in the Mexican resort city of Tulum, officials confirmed Sunday.

Prosecutors in the Caribbean coast state of Quintana Roo stressed the American woman had no connection to an alleged drug dealer also killed in the shooting Friday night. Prosecutors didn’t provide the woman’s name or hometown, and the U.S. Embassy did not respond to a request for comment.

The woman may have simply been caught in the crossfire. Prosecutors denied reports in local media that the two may have been a couple, saying a photo of the Belizean man showed him with a completely different woman.