Accused Minnesota assassin Vance Boelter's alleged plan to kill more politicians on his target list was foiled by a police sergeant's proactive hunch.

Boelter was arrested in a field located in a rural part of Sibley County, in southwest Minneapolis, and he was being interviewed at a law enforcement facility, Drew Evans, the superintendent of the state’s Bureau of Criminal Apprehension, said.

Vance Boelter remains at large as the manhunt continues. Officials warn people public not to approach him if he's spotted.

As investigators probe the extent of alleged political assassin Vance Boelter's plot targeting Minnesota lawmakers, some questions remain unanswered.

Authorities detained the wife of 57-year-old Vance Boelter, the suspect accused in the deadly shooting of a Minnesota state lawmaker and her husband early Saturday morning.

Vance Boelter, 57, was arrested late Sunday night after what law enforcement officials said was the largest manhunt in Minnesota's history.

In a politically motivated attack, two Minnesota lawmakers were shot in their homes early Saturday. Former House Speaker Melissa Hortman was killed, while State Senator John Hoffman was wounded. Authorities are conducting a statewide manhunt for the suspect,

Joseph Thompson, acting U.S. attorney for the district of Minnesota, is expected to announce federal charges against Vance Luther Boelter later Monday.