Detectives working an arson case that has crossed the border into Pasadena say there's been an uptick in fires over the last two weeks.
Det. Bill Earley told Patch Tuesday that police have found similar devices at all the crime scenes indicating the blazes were set purposely. Many of the fires occurred along Arroyo Drive, at about 10 p.m.
South Pasadena Police also discovered an arson fire in the alley alongside a house in the 800 block of Grand Avenue in South Pasadena. Another fire was ignited in the high school parking lot, Earley said.
Some of the fires have caused property damage, he said.
Arroyo Drive turns into Arroyo Boulevard and connects with South Grand Avenue in Pasadena, where authorities have also identified some arson fires.
"We ask all citizens to be aware of any suspicious vehicles along the Arroyo, and to call police'' if they see anything out of the ordinary, Earley said.
South Pasadena Police may be reached at 626.403.7270.
Editor's Note: An earlier verion of this article misspelled Det. Bill Earley's name. Patch apologizes for the error.