A white powder discovered in an envelope addressed to Los Angeles Mayor Antonio Villaraigosa was probably chalk, according to police.
A portion of the mayor’s office on the third floor of City Hall was evacuated Thursday afternoon after one of Villaraigosa's employees discovered the white substance and alerted authorities.
The envelope also included a “threatening letter” addressed to Villaraigosa, according to Los Angeles Police Cmdr. Blake Chow. He said it appears the envelope may have been sent from a correctional facility out of state.
Chow said the incident will be investigated by the FBI, as well as local police.
The mayor’s staff was let back into the office shortly before 6 p.m. Villaraigosa was in his office when the envelope was opened, but he left for a meeting shortly afterward.