TOPEKA, Kan. (AP) — Authorities have found a possible bomb while serving a search warrant at the home of one of the three suspects in a double homicide in Topeka.

Topeka police Lt. Andrew Beightel says the discovery was made Thursday as officers searched for evidence related to the killings of 28-year-old Lisa Sportsman and her cousin, 17-year-old Jesse Polinskey, in the small Washington County town of Greenleaf.  Details about the suspicious item weren’t made available Thursday afternoon.

Police say the two victims were pronounced dead Monday at a residence in Topeka’s Hi-Crest neighborhood after paramedics arrived. Police say they had been stabbed and beaten to death.

Sportsman’s estranged husband Bradley Sportsman, Richard Showalter and Matthew Hutto were arrested Monday afternoon during a traffic stop in Topeka.