KOKOMO, Ind. - Kokomo Emergency responders from Howard and Tipton counties were mobilized late Wednesday after receiving many calls about a large explosion.

Dozens of residents reported hearing, feeling or seeing some kind of explosion near Kokomo about 10:30 p.m., but about midnight, a Tipton County Sheriff's Department dispatch official said police and fire crews still were searching for debris or other evidence of a blast. One resident interviewed on the air by WTHR (Channel 13), The Indianapolis Star's news-gathering partner, said she felt her house shake violently and saw a fireball.

Other witness accounts varied from a blast to bright lights to a house-shaking rumble, officials said.

About 11:30 p.m., the Federal Aviation Administration reported no missing aircraft, WTHR reported.

Kokomo, home to about 46,000 people, is about 50 miles north of Indianapolis in Howard County.