A 14-year-old Boston boy charged with fatally shooting his 9-year-old brother has been held on $50,000 bail.

Prosecutors say the boy, whose name has not been made public because of his age, was arraigned on delinquency charges of involuntary manslaughter and illegal possession of a firearm Monday in Dorchester Juvenile Court, where proceedings are closed.

The boy's lawyer, Michael Doolin, says his client is ``very scared and very heartbroken.''

Police identified the 9-year-old Monday as Jan Marcos Pena.

Police were called to the boys' home in the city's Mattapan neighborhood at about 11:30 a.m. Friday and found the wounded boy. He was pronounced dead at a hospital.

The shooting is thought to be accidental.

Police are investigating how the boy got the gun and why the children weren't in school. Their mother wasn't home at the time.

(Associated Press)