Lawrence-Douglas County Fire Medical officials ruled Thursday that the fire at Pet World, 711 W. 23rd St., was accidental, Fire Department Division Chief Eve Tolefree said.

Fire investigators determined the fire was due to “an electrical event in the main breaker panel,” Tolefree said. The store’s total damages are estimated to be about $500,000.

Firefighters responded to a report of a fire at the building around 12:30 p.m. Monday, Tolefree said. The business had been closed for Memorial Day.

Pet World co-owner Sherry Emerson said Tuesday that she would not disclose how many animals died in the fire, but said all of the store’s mammals and birds, some reptiles and some fish perished.

Firefighters were able to rescue several animals, including a few iguanas, some fish and a Burmese python and other reptiles. Some feeder rats, a few hamsters and gerbils stored in a separate structure were alive.