Two suspected drug gang members were shot dead near a Cancun resort in Mexico on Thursday.
Authorities said opposing gangsters faced off on a beach in Bahia Petempich and two among them were killed a few hours after reports of a shooting circulated online.
Police said earlier that a group of armed men carrying long guns was seen in the area near the Azul Beach hotel.
An official added that a group of gunmen arrived by boat in pursuit of the men,
who were later slain.
Another Mexican official said it appeared to be a targeted 'execution'.
Alarmed tourists had tweeted that shots were fired at a Cancun resort, where staff had told them to hide.
Local TV reported that at least one tourist in the area was treated for a head injury.
It comes after a gangland slaying a few weeks ago in the resort town of Tulum some 50 miles away from Cancun.
Two tourists were killed in crossfire at a beach there, and military forces were sent in to reinforce the area.