The National Oceanic and Atmospheric Administration (NOAA) is seeking the public's help in a disturbing case.
The US organisation is offering a reward of up to $20,000 - about £15,500 - for information about the recent deaths of two dolphins in Florida.
The first dolphin was found "fatally wounded from what appeared to be a bullet and/or sharp object".
The same week, another dolphin was recovered with a bullet in its left side.
The NOAA said: "Harassing, hunting, killing or feeding wild dolphins, or attempting to do these activities, is prohibited under the Marine Mammal Protection Act."