Three bus drivers with Santa Clarita Transit tested positive for the novel coronavirus, city officials announced on Tuesday, March 31, and one has died.

“We are working closely with our partners at MV Transportation to ensure buses and facilities are sanitized and deep-cleaned,” according to the statement released by the city of Santa Clarita.

Roughly 3,000 people have been infected with COVID-19 across Los Angeles County. The county coronavirus death toll topped 54 on Tuesday, according to public health officials.

The city of Santa Clarita issued a local emergency order on March 13 in response to the virus pandemic. The following day, the city ordered the closure of all non-essential services and city facilities until April 19.