(CBS Local) — Here is what we know so far about the mass shooting overnight in Las Vegas.

Developments are fluid and subject to change.

1) At least 58 people were killed and more than 515 sent to local hospitals after the shooting at the Route 91 Harvest Country Music Festival. It is the deadliest such shooting in U.S. history. Jason Aldean was performing at the time of the shooting.

2) The suspected gunman, Stephen Paddock, 64, fired multiple rounds from an upper floor room at the nearby Mandalay Bay hotel. He was found dead at the scene with as many as 10 firearms. According to published reports, Paddock committed suicide. His motive has not yet been determined. The sheriff said a check of federal and state databases showed Paddock was not on law enforcement authorities’ radar before the bloodbath.

3) The U.S. Homeland Security Department says there is no “specific credible threat” involving other public venues.

4) President Trump extended sympathies to the victims and their families.

5) One concert-goer, Gail Davis, described the scene and how a local police officer saved her life. “He was like my guardian angel,” she said.

6) Aldean, along with many other country music stars, posted reactions on social media.

[H/T: CBS Chicago]