An 11-year-old Lebanese boy who was shot in the forehead by an Israeli soldier in southern Lebanon yesterday died of his wound, Israeli military officials said today.

Calling the incident "very unfortunate," the officials said the youth was treated by an Israeli military doctor at the scene of the shooting but died before he could be evacuated to a hospital by an Israeli military helicopter.

The shooting incident was witnessed and reported by Nora Boustany, a special correspondent for The Washington Post, and by a reporter for ABC Radio with whom she was traveling in southern Lebanon.

Israeli military officials said they were still trying to piece together details of the incident but understood that the automobile in which the youth was riding had failed to stop after having been flagged down by Israeli soldiers at a roadblock.

At that point, the officials said, the Israeli soldiers who were manning the roadblock near the village of Braiqaa opened fire, mortally wounding the youth. Boustany's eyewitness account of the incident was reported in today's editions of The Post.

Israeli military officials said they had no further details tonight on this incident or on the fate of three men who were said to be armed and also detained at the roadblock.