LOS ANGELES (AP) _ Portable metal detectors will be rushed into service at all Los Angeles public high schools in response to the shooting death of a 17-year-old in a crowded hall, the schools superintendent says.

It was the second slaying in a Los Angeles high school this year.

The earlier shooting prompted the district to begin random weapons searches with hand-held metal detectors. But so far, only about a dozen are in use.

Superintendent Sid Thompson said Monday that 200 detectors had been acquired and would be in use at all high schools in two or three weeks and eventually at all junior highs.

''My intention is to use them every day at every school,'' he said.

The 640,000-student district has 92 high schools and 72 junior highs.

Police said Monday's shooting at Reseda High School in suburban San Fernando Valley involved members of rival teams of graffiti vandals.

Michael Shean Ensley was shot at close range. A 15-year-old boy was captured by school district police and held for investigation.

The metal detectors that were introduced after a fatal shooting Jan. 21 at Fairfax High had not yet been used at Reseda High.

The metal detectors have turned up knives and brass knuckles but no guns, Thompson said.