WASHINGTON - A shooting incident in the metro system in the US state of Atlanta has left one dead and three injured, local media reported Thursday.

The incident took place at around 4:30 pm local time (2130 GMT) in the West Lake Station, and the shooter appeared to be firing randomly at passengers, Atlanta TV station WGCL quoted witnesses as saying.

All of the victims and the perpetrator appeared to be in their 30s, and at least one of the victims was female, according to witnesses.

The Metropolitan Atlanta Rapid Transit Authority, the metro's governing body, said the suspect has been arrested and investigation is underway. The nature of the attack is yet unclear.

US President Donald Trump said in January that Atlanta is "crime-infested" during a row with Democratic House Representative John Lewis, who represents Atlanta and its surrounding area.