In the third such incident in two days, some some suspicious envelopes, including one containing a powdery substance, prompted a hazardous materials investigation at a downtown Los Angeles courthouse Thursday, but no threat was found, authorities said.
Similar letters were received Wednesday at the Van Nuys and Burbank courthouses, authorities said.
A Los Angeles County Sheriff’s Department hazardous materials team responded about 9:30 a.m. to the Stanley Mosk Courthouse at 111 N. Hill St., after suspicious letters were sent to court personnel, sheriff’s Deputy Sara Rodriguez said.
Hazmat detectives collected a powdery substance from one of the envelopes, she said.
“The exact name of the substance is unknown at this time and will be determined by Los Angeles County Department of Public Health personnel,” Rodriguez said.
The hazmat investigation was wrapped up about 12:20 p.m. and the building was deemed safe, Rodriguez said.
No evacuations were ordered, according to the Los Angeles Fire Department, which also responded to the scene.
“The circumstances behind the receipt of the envelope are still under investigation,” Rodriguez said.
Burbank police Sgt. Adam Cornils said two envelopes containing a white powder and addressed to judges were received at the Burbank Courthouse at 300 East Olive Street Avenue about 1:30 p.m. Wednesday.
The powder was determined not to be hazardous, he said.
The building was not evacuated, the sergeant said.
The letters are being investigated by the FBI, the U.S. Postal Inspection Service, the Los Angeles County sheriff’s and fire departments and Los Angeles and Burbank police, said FBI spokeswoman Laura Eimiller.
“Trained investigators have and continue to conduct field testing and will have letters further tested at regional laboratories,” she said. “Individuals who handled the letters are asymptomatic. At this time, there are no stated threats associated with the letters known to law enforcement. Based on similarities, partner agencies will investigate whether the letters sent to various offices are linked.”
— City News Service