San Diego

Two San Diego teen-agers pleaded innocent Thursday to charges of assault with a deadly weapon stemming from a concrete-throwing incident that left a San Carlos man critically injured.

The boys, ages 13 and 15, were ordered by Superior Court Judge William C. Pate to remain in custody at Juvenile Hall.

Prosecutor Robert Amador filed a petition during a detention hearing Thursday charging the boys--a 13-year-old from Golden Hill and a 15-year-old from Point Loma--with three counts of assault with a deadly weapon.

The charges stem from two incidents Feb. 29 at the Pershing Drive overpass on Interstate 5, prosecutors said.

One of the chunks of concrete thrown from the overpass crashed through the the sunroof of a Corvette driven by Kurt R. Meyering, 24, police said. The passenger in the car, Jane Casey, escaped injury.

Another car northbound on Interstate 5 was struck by a concrete rock minutes before the car Meyering was driving was hit, police said. The other driver was not hurt.

Meyering, an aspiring actor, has remained in critical condition and hooked to life-support machines at Mercy Hospital since that night. Doctors have kept him in a drug-induced coma to reduce pressure on the brain as a result of the injury.

Police officials, who announced the arrests of the boys Tuesday based on tips from the public, had asked to the district attorney’s office to file attempted-murder charges against the boys. Linda Miller of the district attorney’s office said it is unlikely that the boys will be tried as adults.