The bodies of two dolphins with bullet and possibly stab wounds have been found washed up on Florida’s Gulf coast.

A reward of $20,000 (£15,419) is being offered to anyone who is able to help US authorities solve the case.

According to the Florida Fish and Wildlife Conservation Commission and the National Oceanic and Atmospheric Administration, one dolphin was discovered dead in waters off Naples in southwest Florida late last week. Officials said the animal had received bullet or stab wounds – or possibly both.

Also last week, the Emerald Coast Wildlife Refuge found a dolphin with a bullet in its left side along Pensacola Beach in the Florida Panhandle.

Experts believe the two deaths might have stemmed from humans feeding the animals. When dolphins learn to associate people and boats with food, they can expose themselves to dangerous situations.

The Florida Fish and Wildlife Conservation Commission urges people to not feed wild dolphins.

Since 2002, at least 29 dolphins have been stranded with evidence of being shot by guns or arrows, or impaled with objects such as fishing spears.

In May 2019, a dolphin was found dead off Captiva Island with a fatal puncture wound to its head. An investigation into that death is still going on.