PORTLAND, Ore. -- Three early-morning car fires were reported in southeast Portland Tuesday, and investigators are working to find out if they are connected.

Portland Fire and Rescue spokesman Lt. Tommy Schroeder said it looks like someone intentionally the set three fires, all within a 12-block radius.

The calls for help happened within a 20-minute span.

The first car fire was reported at 5:47 a.m. in the 800 block of Southeast 27th Avenue, then another fire was reported at three minutes later, at Southeast 25th Avenue and Morrison Street.

The last fire was reported at 6:10 a.m., at Southeast 15th Avenue and Oak Street. A Jeep was set on fire, and the fire spread to another car in front of it.

Investigators have not said how they think the fires were started and they have no suspect information. But they do believe the fires are arson.

Anybody who sees someone in the act of setting a car on fire should call 911. Other tips can be reported on the non-emergency line at 503-823-3333.

Portland Fire & Rescue is looking to see if the same person is responsible for setting cars on fire, in three different locations in SE Portland, in less than an hour. Happened this morning, about 6am. One in the 800 block of SE 27th Another at 25th and Morrison and the last at SE 15th and Oak. Devastating. However, some of the car's owners tell me they are SO thankful that everyone is ok, and that the fires did not spread to any buildings. More information, here -- http://www.kgw.com/news/string-of-car-fires-in-se-portland-considered-arson/455772060

Posted by KGW's Rachael Rafanelli on Tuesday, July 11, 2017

Portland Fire investigators are busy trying to find out what happened to several cars in the Buckman neighborhood.

Posted by KGW photojournalist Eric Patterson on Tuesday, July 11, 2017