The Baton Rouge Fire Department responded to three residential fires Wednesday evening within an hour and a half of one another with one caused by a 4-year-old playing with a lighter and another caused by an arsonist, a fire official said.

The first fire happened just before 6:10 p.m. at 5641 St. Katherine Ave., the Fire Department said in a news release. Fire crews could see flames inside the windows and later determined the blaze was intentionally set, said Mark Miles, a Fire Department spokesman.

A suspect was arrested in the incident, Miles said.

The next fire happened a block away, at 6137 St. Katherine Ave., about 45 minutes later, Miles said. The owner of the house, who uses a wheelchair, escaped safely, but the $31,000 house was destroyed, Miles said.

Investigators have not yet determined a cause of the fire.

The third fire happened just before 7:20 p.m., when a 4-year-old playing with a lighter caused the blaze that damaged a Marquee Ann Drive duplex, Miles said.

The youngster’s parents thought they had put the fire out, but when firefighters arrived, they discovered the fire still burning inside the walls, Miles said.

The fire caused water damage on one side of the duplex and heavy fire and smoke damage on the other side, Miles said.

Firefighters were called to the duplex at 1631 N. Marquee Ann Drive at 7: 20 p.m. and had the blaze under control shortly before 8 p.m.

No one was injured in the incident, Miles said.