(Portland, OR) -- Portland Fire & Rescue responded to seven fires early Sunday, and investigators say they're all suspicious. The first call to 911 was for a tent trailer on fire near Northeast Seventh and Fremont. As they worked to put out that blaze, they were notified of several other fires. The trailer fire spread to a garage. The other fires were in a utility trailer, a dumpster in Irving Park, two different stumps and a shed in the same park and the garage door of a home. Investigators are asking for tips and surveillance video that might help identify a suspect.