DUBAI, United Arab Emirates (AP) — The U.S. has issued a new alert to maritime traffic over alleged "acts of sabotage" of ships off the coast of the United Arab Emirates amid heightened regional tensions between American and Iran.

The U.S. Maritime Administration, which stressing the incidents had not been confirmed, warned shippers early Monday to exercise caution when traveling past Fujairah, a port city on the eastern edge of the United Arab Emirates on the Gulf of Oman.

It gave coordinates of the alleged sabotage, putting it just north of Fujairah.

The UAE on Sunday said the sabotage targeted four boats, without elaborating or naming suspects. It came just hours after Iranian and Lebanese media outlets aired false reports of explosions at the nearby Emirati port in Fujairah, which bunkers and ships oil.