A 31-year-old woman swimming in a Florida river and a 28-year-old man wading off a beach in Puerto Vallarta, Mexico, were killed in crocodilian attacks within days of each other, according to local authorities. A third incident, in which a dog was taken by what officials believe to be a saltwater crocodile in inland Queensland, Australia, has placed a remote community on alert.

In Florida, the woman was hiking with her boyfriend and a friend in the Little Big Econ State Forest on Sunday when they entered the Econlockhatchee River to cool off, the Florida Fish and Wildlife Conservation Commission (FWC) said. An alligator bit both her arms in roughly three feet of water. Her boyfriend attempted to pull her free and called emergency services, but she died before reaching a hospital. The FWC reported that two large alligators—one 13 feet, the other 12 feet—were harvested near the scene, and DNA analysis is underway to determine which animal was responsible. Officials noted that drought conditions and territorial behaviour at the end of mating season may have been factors.

In Mexico, the attack occurred on Friday evening at a beach adjacent to the Marriott Puerto Vallarta Resort and Spa. Jalisco state police identified the victim as Irving Mauricio, a tourist from Mexico City. A California couple who witnessed the attack told local media they attempted a rescue by kayak but were unable to reach him before a crocodile, described as roughly 12 feet long, pulled him under. A search operation involving naval and civil protection units recovered the man’s body the following morning. The crocodile was captured. Police confirmed the beach remained open, with permanent warning signs in place near river mouths and estuaries.

In Australia, the Richmond Shire Council in Queensland warned residents to avoid the Flinders River after a dog was taken on Monday night at a crossing near the town, some 660 kilometres inland from the Gulf of Carpentaria. The council’s chief executive said no saltwater crocodile had ever been recorded in the area, though freshwater crocodiles are common. Queensland’s environment department stated that saltwater crocodiles can travel hundreds of kilometres upstream during prolonged wet weather, and an investigation has been launched. Warning signs are being installed, and the public has been urged to report sightings.

All three incidents remain under investigation. The FWC has not released the Florida victim’s name, citing the need to notify out-of-state family. In Mexico, the victim’s mother posted a tribute online. Australian authorities have yet to confirm the species of crocodile involved, though a zoologist noted that a saltwater crocodile travelling that far inland would be unusual but not impossible. No link between the events has been suggested by officials.