Police charge man over fatal shooting of 12-year-old boy in Sydney

A 19-year-old man has been charged with murder over the shooting death of a 12-year-old boy in Sydney's north last month.

Police were called to a unit in Norwest on September 21 about 5pm and found the boy with a gunshot wound to his face and neck.

He was treated at the scene by paramedics before being taken to hospital in a critical condition.

He died in hospital three days later.

Police said nine people were in the home at the time of the incident but were not injured.

Police arrested three 18-year-old men, with two later released pending further inquiries.

The third man was taken to Riverstone Police Station, where he was charged with conceal serious indictable offence.

He remains before the courts.

Under Strike Force Janilo, yesterday detectives arrested a 19-year-old man, who was an 18-year-old at the time of the incident, at a correctional facility in Silverwater.

He has been charged with murder.

The man is due to appear in the Bail Division Local Court today.