TOPEKA, Kan. (AP) — A mother has been arrested on suspicion of threatening staff at the Kansas jail where her son killed himself more than a decade ago.

The Topeka Capital-Journal reported that the woman was booked Friday into the Shawnee County Jail. No charges were listed against the woman in online court records.

Major Tim Phelps said a woman called Friday morning and said she would come to the jail “with a high-powered rifle and kill us.” For three hours, armed guards could be seen patrolling the perimeter and on top of the jail. A lockdown ended about 11:45 a.m.

Phelps said the woman said she was upset the jail “brutally killed her son.”