Nearly 100 arson fires in Portland under investigation

One of the maps showing the locations of many recent arson fires in Portland.

Arson investigators are asking the public to help identify those responsible for nearly 100 arson fires in Portland over the past two weeks.

According to the list released by the Portland Police Bureau and Portland Fire & Rescue, most of the fires were set in and near downtown. Suspected causes include fireworks and Molotov cocktails. Targets range from offices to vehicles to portable toilets, piles of debris and dumpsters.