City firefighters kept busy Tuesday afternoon with a series of calls in close succession, including two structure fires. No injuries were reported in the fires, the first of which was reported at about 3:20 p.m. in the rear of 1218 N. Memorial Drive, and the second of which was reported at about 4:15 p.m. in the 3200 block of Spruce Street. The fire on North Memorial started in a motorcycle parked in the back of the home on North Memorial, Fire Department Battalion Chief Willie Hargrove said.