Police officials have said they cannot find any record of such calls.

Two others were shot to death, although police officials today could not say exactly when or where.

Police officials did not think that level of security was high enough.

Police officials said they did not believe the two cases were related.

Police officials said they were not sure who had been driving.

Police officials said they had no record of an organization by that name.

Police officials said it would take time to piece the events together.

Police officials will also ask parents to do the search themselves.

Police officials said they had no records of any such calls.