Qatar did not immediately acknowledge the incident.
The UAE’s Foreign Ministry identified the four sailors by name and rank in a statement Monday. It said the vessel, flying the Qatari flag, “entered UAE territorial waters” on April 30. The ministry did not elaborate.
Qatar’s Government Communications Office did not immediately respond to a request for comment from The Associated Press.
The incident is just the latest in a series of confrontations between Qatar and the UAE, which with Bahrain, Egypt and Saudi Arabia has boycotted Doha over a political dispute since June 2017.