NBC Chicago

A standoff in Midland, Texas, is over and the suspected gunman behind a mass shooting that injured 11 people and killed another is dead, according to the city's mayor.

Midland Police confirmed they were called to a shooting near the 4600 block of West Wall Street and that officers reported hearing gunfire coming from the building, and that they worked quickly to secure and clear the area.

Midland Mayor Lori Blong posted on social media at about 11:30 a.m. that "the active shooter situation has ended and the shooter is confirmed deceased." Further details have not been released.

With many still cleaning up debris and working to restore power following a night of intense winds and storms, the Chicago area was again battered by severe weather Thursday.

Multiple confirmed tornadoes were reported in Streator and in Dwight, sparking warnings in LaSalle, Grundy and Kankakee counties.

A large and damaging tornado also made its way through Lake and Porter counties in Indiana, according to officials.

Friday should bring quieter conditions to the area, but clean-up efforts will once again have to begin in earnest in communities devastated by storms, and damage assessments will be underway to determine how many tornadoes struck the area.