SEATTLE (AP) — Authorities say eight county courthouses around the state received bomb threats, forcing evacuations and police searches.

KOMO News reports that authorities don’t know if Thursday’s threats were coordinated. No devices were found at any of the courthouses.

Threats were made to Thurston, Chelan, Douglas, Benton, Adams, Clark, Pacific and Columbia counties.

Douglas County Sheriff Harvey Gjesdal told the Wenatchee World that the Douglas County Commissioner’s Office received a phone call at 3:52, warning them of a bomb in the courthouse. Authorities evacuated the courthouse and searched area, but did not find a bomb.

Similar sounding calls were made to the other counties.