Police in the US state of Alabama have arrested three suspects in connection with the fatal shooting at a birthday party.

The third person is a 20-year-old man who was caught by the police on Wednesday afternoon, the police said. Two youths aged 17 and 16 were arrested on Tuesday, said Jeremy Burkett of the local police. All three have been charged with murder.

The act of violence in the town of Dadeville had caused horror. Four people were killed and many others injured at a youth birthday party on Saturday night. Four victims are still in mortal danger, it is now said.

The police did not provide any information about the possible motive or the background. The incident in the town of around 3,000 residents occurred at a girl's 16th birthday party. Rampages and shootings are part of everyday life in the USA.