School grounds are training ground in Seal Beach, site of O.C.’s deadliest shooting Seal Beach police officers participate in an active shooter simulation Monday at McGaugh Elementary School.

SEAL BEACH, Calif. (KABC) -- Gunshots echoed throughout the campus of McGaugh Elementary School as the Seal Beach Police Department and other fire agencies performed an active shooter training drill.

A Long Island high school is under lockdown after an apparent threat from a 15-year-old student who claimed to be armed with an AR-15 semiautomatic rifle, law enforcement sources said.

Gunshots echoed throughout the campus of McGaugh Elementary School as the Seal Beach Police Department and other fire agencies performed an active shooter training drill. "We're really lucky in ...