A 67-year-old Lihue man was arrested Friday afternoon in connection with a case involving threats to a Kauai County Council member, according to the Kauai Police Department.

Glenn Gruenhagen was arrested at about 4 p.m. Friday for suspicion of first-degree terroristic threatening and harassment, according to a KPD news release.

Letters to Councilmember Billy DeCosta were allegedly left at the Historic County Building around noon on Jan. 12. The incident was reported to KPD on Tuesday as the letters were “perceived as a threat,” according to police.

“We would like to thank the community for remaining vigilant during this investigation,” Kennison Nagahisa, acting captain of KPD’s Investigative Services Bureau, said in the release. “We also appreciate the diligent work of our officers in securing an arrest for this case.”

Gruenhagen was being held at KPD cellblock with bail set at $5,050. The investigation is ongoing, police said.