WASHINGTON, D.C. -- The National Transportation Safety Board yesterday released the following updated information on its investigation of the April 23 collision involving a Burlington Northern Santa Fe freight train and a Metrolink passenger train in Placentia, California, which resulted in two deaths and numerous injuries.

Toxicology Test Results The results of the toxicology tests given to the dispatcher, conductors and engineers operating the freight train and Metrolink passenger train have been received. All five employees tested negative. Federal regulations mandate that post-accident toxicological test be administered to crew-members operating vehicles involved in accidents as well as to other safety sensitive employees involved in transportation accidents. Results of these tests have been provided to the NTSB as part of its investigation.