What to know about man suspected of shooting two Minnesota lawmakers and their spouses, resulting in one couple dying.

Residents of Sibley County are encouraged to lock their doors and secure their vehicles, adding that law enforcement will be going to area residences to ask to search properties.

Vance Boelter is accused of posing as a police officer and fatally shooting former Democratic House Speaker Melissa Hortman and her husband, Mark, in their home early Saturday in the northern Minneapolis suburbs.