According to authorities, there have been several injuries and at least four fatalities from a mass shooting in Birmingham, Alabama.

Late on Saturday in the city's Five Points South neighborhood, "multiple shooters fired multiple shots on a group of people," according to Birmingham police officer Truman Fitzgerald.

Police found the bodies of two men and one woman at the scene and a fourth victim died of bullet wounds in hospital, he said.

Detectives are investigating whether the gunmen walked up to the victims or drove by, Mr Fitzgerald added. No suspects have been arrested.

The Five Points South district is known for its nightlife.

Speaking about the injured, Mr Fitzgerald told reporters: “We have dozens of gunshot victims from this area. I’m told at least four of those gunshot victims are life-threatening."

There have been more than 400 mass shootings across the US so far this year, according to the Gun Violence Archive, which defines a mass shooting as an incident in which four or more people are injured or killed.