Hundreds of law officers fanned out across a Minneapolis suburb Saturday in pursuit of a man who authorities say posed as a police officer and fatally shot a Democratic state lawmaker in her home in what Gov. Tim Walz called “a politically motivated assassination.” Authorities said the suspect also shot and wounded a second lawmaker and was believed to be trying to flee the area, Associated Press reported.

Democratic former House Speaker Melissa Hortman and her husband, Mark, were killed in their Brooklyn Park home. Sen. John Hoffman, also a Democrat, and his wife, Yvette, were injured at their Champlin address, about 9 miles (about 15 kilometers) away.

Authorities identified the suspect as 57-year-old Vance Boelter, and the FBI issued a reward of up to $50,000 for information leading to his arrest and conviction. 

Authorities displayed a photo taken Saturday of Boelter wearing a tan cowboy hat and asked the public to report sightings. Drew Evans, superintendent of the Minnesota Bureau of Criminal Apprehension, said investigators obtained video as well, according to Associated Press.