A man was shot and killed by police after he allegedly threatened residents and staff of a suburban assisted living facility with a chainsaw on Sunday.

The man, who did not have authorization to be in the Illinois facility, confronted residents while armed with the chainsaw, police said.

A man who Illinois authorities said threatened senior-living facility residents and staff with a chainsaw on Sunday was shot to death by police.

Daniel H. Escalera, 41, of Stockwell, Indiana, was pronounced dead at Northwestern Medicine Delnor Hospital following the incident, according to a joint statement from the Kane County State's Attorney's Office and St. Charles police. An autopsy was scheduled for Monday.

A scary situation unfolded at a senior living facility when a man wielding a chainsaw attempted to attack residents and responding police over the weekend.

A shirtless man was reportedly attempting to cut down a tree outside around 8:45 a.m. of the building before he then entered the senior living facility, police said.

A chainsaw-wielding man was shot and killed by police at a senior living facility near Chicago Sunday. Police said it started after they got a call about a shirtless man trying to cut down a tree with a chainsaw at the River Glen of St. Charles senior living center, according to ABC 7 Chicago.

A man who threatened residents at a senior living facility with a chain saw was fatally shot by police in St. Charles, Illinois.