Officials can't track down cause of smell that sent Canton firefighters and Dominion Energy crews scrambling Tuesday and Wednesday nights.

CANTON  Officials haven't tracked down the source of a natural gas odor that had safety and utility crews scrambling Tuesday and Wednesday nights.

Dominion Energy Ohio investigated nearly 100 airborne odor complaints Wednesday evening. About 80 of the calls came from central Canton and another 20 calls were from north of the city extending toward Green. The calls started around 5:45 p.m. on Wednesday.

Similar calls about a natural gas odor came in at about 7:30 p.m. on Tuesday in the area of 25th Street and Fulton Road NW. Canton firefighters investigated but couldn't find a source for the odor.

Air pollution control meters monitored by the Canton City Health Department didn't record any unusual readings on either evening, officials said.