CONNEAUT LAKE, Pa.—Fire crews are starting to wonder if there's a connection between four cottage fires in the last three weeks near Conneaut (KAW'-nee-aht) Lake in northwestern Pennsylvania.

The first fire was reported on May 30 and the latest occurred early Tuesday.

Fire officials in Summit Township, Crawford County, say all the fires were reported between 2 a.m. and 5 a.m. and all appear to have been intentionally set in cottages that are either abandoned or weren't currently being used.

The Meadville Tribune ( http://bit.ly/NPcpSS) reports Wednesday that one firefighter was overcome by heat battling a fire early Saturday, while another firefighter hurt his leg battling the fire on Tuesday.

State police troopers and a fire marshal are also investigating.

Conneaut Lake is about 85 miles north of Pittsburgh.

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Information from: The Meadville Tribune, http://www.meadvilletribune.com