The Iowa City Public Library closed early Tuesday after receiving a bomb threat. 

The library received a bomb threat around 3:30 p.m. and closed the building to the public, according to a press release from the library. The library alerted the University of Iowa Police Department, which sent a K9 unit to sweep the building.

The situation is still under investigation, and the library will operate regular hours on Wednesday. 

Elsworth Carman, the library director, said in a release that the library will update the community as more information becomes available.

“We would like to thank the Iowa City Police Department for their swift and comprehensive response,” Carman said in the release.