(Portland, OR) -- An investigation is ongoing into a string of fires in North Portland's St. Johns neighborhood. Police say the fires started in mid-January with a small blaze near some trash cans on Lombard Street. A small fire was set on the steps of a church later last month, and early this month, crews responded to a fire at an apartment complex's dumpster area. It's not yet clear if the fires are connected. Police are still working to identify suspects.