Here's what we know so far about the timeline of events on Saturday: According to Minnesota Bureau of Criminal Apprehension Superintendent Drew Evans, State Sen. John Hoffman and his wife, Yvette, were shot when a man impersonating a police officer showed up to their house in Champlin.

A massive search continued Sunday for a man suspected in the fatal shooting of Minnesota state Rep. Melissa Hortman and her husband, and a separate shooting attack on another state lawmakers and his spouse, authorities said.

A manhunt is currently underway for the man, who allegedly shot John Hoffman in Champlin and Melissa Hortman in Brooklyn Park.

Police first responded to a call of a shooting at Hoffman's home in Champlin at around 2 a.m. Saturday, Drew Evans, the superintendent of the Bureau of Criminal Apprehension, said in the briefing.

Democratic former House Speaker Melissa Hortman and her husband were killed, while Sen. John Hoffman was injured in a shooting on June 14. The suspect, Vance Boelter, remains at large. Audio emergency calls have revealed harrowing details.

The Minnesota Star Tribune has obtained audio of the dispatches, which capture the dramatic attempts to save them, and the ongoing threat to first responders, who at one point note that the shooter is still in Hortman’s home.

Police are investigating two shootings targeting elected officials in Minnesota that could possibly be connected, officials said.