A Tongan teenage boy was killed and his younger brother was left injured after police say at least two men began shooting at them outside their East Oakland home in California, United States.

Soane Mausia, 18, was identified as the teen killed while his 16-year-old brother’s name was not released.

A relative of the victims, who did not want to be identified, told Kaniva News her son was friend with the teens.

She claimed the injured boy was in critical condition in hospital.

“The shooting happened about 2:55 a.m. Sunday in the 1700 block of 78th Avenue, a residential area not far from Arroyo Viejo Park,” East Bay Times has reported.

The paper has quoted Sgt. Omar Daza-Quiroz as saying “the two were standing with other relatives outside their home socializing when at least two men ran up to the group and began shooting at them.”

“Mausia and his brother were the only ones hit by the gunfire. Mausia died at the scene. His brother was taken to a hospital, but his condition was not released. Daza-Quiroz said police don’t have a motive yet for the attack and that no arrests have been made.

“Police and Crime Stoppers of Oakland are offering up to $15,000 in reward money for information leading to the arrest of the suspects.

Anyone with information can call police at 510-238-3821 or Crime Stoppers at 510-777-8572.”