Police are an the hunt for an arsonist or arsonists who has set about 19 fires in Hollywood and West Hollywood Thursday night and Friday morning. Police are urging resident to be on the look out for potential suspects.
"We are preparing for what may be coming tonight," said one LAFD official at a news conference Friday morning.
The fires were all set to parked cars, and the flames spread to nearby homes or apartment buildings. In one case, a fire damaged one of the former homes of Jim Morrison, according to CBS LA.
LAPD announced the department was on tactical alert at 5 a.m. to help secure crimes scenes, protect evidence and boost patrols.
"We're hoping some investigative work that takes place today will reap some benefits," one official said Friday.
A city spokesman says one firefighter was treated and released after being injured. No one else had been injured.
A man who was arrested Thursday on allegations he set three fires in in Hollywood is still in custody.
About a dozen officials gathered at a press conference Thursday afternoon to emphasize that they will catch person or persons behind the 21 fires that spread across Los Angeles overnight.
"We want to get these S.O.B.s before they hurt somebody," said Zev Yaroslavsky, Los Angeles County Supervisor for the 3rd District. "We were very fortunate last night that nobody got hurt.
They also announced that the City of L.A. is offering a $25,000 reward for any information on the perpetrator. On top of that, L.A. county is offering another $25,000 and the Bureau of Alcohol, Tobacco, Firearms and Explosives is offering $10,000.
"If you see anything unusual tonight, any night, day or night, call 9-11," Yaroslavsky emphasized. "You may be able to help accelerate the apprehension of the individual or individuals responsible for this. "
This story has been updated