Bomb threats hit multiple Tennessee courthouses

By NBC News staff A number of courthouses across Tennessee were evacuated Tuesday after bomb threats were called in, state officials said. The Tennessee Emergency Management Agency told NBC News that bomb threats were called in to courthouses in 27 counties throughout the state, beginning at 10:15 a.m. CT Tuesday. Blount, Campbell, Greene, Hamblen and Hancock counties were among those in which threats were made, according to Knoxville, Tenn.'s NBC-affiliate WBIR. Stay informed with the latest headlines; sign up for our newsletter Local law enforcement agencies responded and were evacuating and sweeping the facilities. The FBI also was involved, WBIR reported. As of 1:18 p.m. ET, no devices had been found, according to Tennessee Highway Patrol Public Information Officer Jennifer Donnelly. The source of the calls is still unknown. More content from NBCNews.com: South Korea to sack Tampa socialite Jill Kelley as honorary consul Search for missing Colorado boy suspended as lake sweep yields no clues Woman denies murder to avenge husband's death Columbine survivor turns to Occupy LA to battle foreclosure Video: Should children use medical marijuana? 'They didn't seem afraid': Wild coyotes pay visit to Chicago's Wrigley Field Follow US news from NBCNews.com on Twitter and Facebook