Officials in Knox County, Tennessee, are trying to gather more information about a cyberattack that crashed a government website that displayed election results to the public during its primary election for local offices on Tuesday.

Dick Moran, the county’s top IT official, believes Knox County was the target of a denial-of-service attack in which actors with both domestic and foreign IP addresses deliberately flooded the county’s servers with traffic to try and crash them. The county website displaying election results went down for about an hour as polls closed on Tuesday. The crash meant that people who went to check election results between 8 and 9 p.m. on election night received an error message, according to the Knoxville News Sentinel. While the website was down, election officials printed out hard copies of the election results and gave them to reporters, WBIR, a local NBC affiliate, reported.