PORTLAND — Portland police are investigating a series of fires that were apparently set early this morning in the city’s West End.

Nobody was injured in the four fires reported between 12:14 a.m. and 12:52 a.m. and property damage was minimal, police said, with the exception of a $5,000 motorboat that burned at 242 Valley St. reported at 12:34 a.m.

The first fire reported started in the basement of 143 Grant St., an apartment building, among some recycling bins, police said.

The next came in at 12:32 a.m. at 52 Gilman St. which was apparently a dumpster, police said.

After the boat, which was stored beneath a tarp in a yard, fire was reported at 867 Congress St., a church where some work was being done and some siding material was ignited, police said.

Police asked that anyone who saw anything suspicious call 874-8533.

Police say they are worried because the fires could easily have gotten out of hand and injured someone.

A fire that damaged an apartment building at 52 Federal St. reported at 1:21 a.m., on the other end of town, does not appear to be related and may have started accidentally, authorities said.