By Ari Bloomekatz and Matt Stevens
Arson investigators were at the scene of a wildfire near Los Angeles that exploded in size Thursday to more than 1,700 acres and destroyed at least two homes, authorities said.
Three people had been arrested in connection with the fast-moving Colby fire, but Glendora police declined to provide further information.
L.A. County fire Inspector Scott Miller said the cause of the fire, reported shortly before 6 a.m., was still under investigation, but said arson investigators were on hand and working with Glendora police.
â€œAny time that we canâ€™t immediately identify what happened, we will have them come in,â€ Miller said of the arson team. â€œJust to kind of dot our iâ€™s and cross our tâ€™s.â€
Glendora police Lt. James De Mond confirmed three people had been arrested. He had no other information, including what the allegations against the three people were or where they were taken into custody.
â€œThey are persons of interest in this fire,â€ he said.
A news conference was scheduled for 11 a.m.
Nathan Judy, a spokesman for the U.S. Forest Service, said at about 10 a.m. that more than 1,700 acres had burned.
Chris Jeffers, Glendora city manager, said in an email that the cityâ€™s emergency operations center was activated and â€œwe have declared a state of emergency so that we can better access resources and coordinate them.”
Jeffers said city officials were in the process of assessing the damage.
Inspector Tony Akins with the Los Angeles County Fire Department said the â€œfire is under investigation.â€
About 550 fire personnel were battling the blaze, which has destroyed at least two homes.
Mandatory evacuations were in place for all residents north of Sierra Madre Avenue and east of San Gabriel Canyon Road. The fire was “spreading fairly aggressively” as winds gusted around 25 mph, fire officials said.
Los Angeles County fire Inspector Scott Miller told KTLA-TV that the fire was moving aggressively, “especially for this time of year.â€ He urged residents to follow evacuation orders, saying that although he understood the instinct for people to stand their ground, â€œtheir lives are way more important.â€