A gunman opened fire Thursday inside a Minneapolis sign-making business, killing four people and wounding several others before turning the gun on himself. Three others were critically wounded. There are reports the shooter was a former employee of the business who had been laid off earlier in the day. The tragedy follows a rash of other mass shootings in the U.S. this year and is the latest act of violence involving a shooter with reported financial difficulties. The laid-off employee who killed a former co-worker outside the Empire State Building in New York City last month was reportedly facing eviction. Two weeks before that, a man in College Station, Texas, opened fire on a constable bringing him an eviction notice, killing two people before being fatally shot by police. Minneapolis Mayor R.T. Rybak spoke after Thursday’s shootings.

Mayor R.T. Rybak: “We are deeply, deeply sorry about what has happened here. The employees are together and are being cared for, and the neighborhood, as I mentioned, is secure and will be returning to relative calm. But obviously we will have a horrible crime scene that we’ll be dealing with over time.”