(CNN) -- A person believed to be connected to a series of arson fires near downtown San Jose, California, has been arrested, police said Wednesday.
The arrest comes after a dozen suspicious fires were set over several nights this month. No one was reported injured.
In five of the blazes, residents were still inside the structures when they were torched, San Jose Officer Albert Morales said.
The name of the suspect was not released.
Before the arrest, police had released a sketch of a suspect and offered a reward of $10,000 for information.