On Sunday, October 1, thousands of concert-goers ran for their lives as a gunman went on a shooting rampage at the Route 91 Harvest Festival in Las Vegas, Nevada.

The shooter, who was later identified as 64-year-old Stephen Paddock, opened fire from the window of his 32nd-floor hotel room at the nearby Mandalay Bay Resort and Casino. 

In just a few minutes, Paddock fatally shot 50 victims and injured over 500 people as they frantically made their way through the massive crowd. As of October 2 at 12:30 EST, the death toll had risen to 58.

In the hours following the country's deadliest mass shooting in modern history, countless celebrities took to social media to express their sorrows and deepest condolences over the tragic event.

1

Jason Aldean — who was performing as the first rounds were fired — immediately issued an emotional statement on Instagram as soon as he reached safety.

2

Jake Owen asked the world to pray for victims.

Jake Owen's reaction to the Las Vegas massacre
photo: Twitter

Owen was also on stage with Aldean at the time of the shooting.

3

Country stars sent messages of support and sadness.

Chris Young's reaction to Las Vegas massacre
photo: Twitter
4
photo: Twitter
5
Brad Paisley's reaction to the Las Vegas shooting
photo: Twitter
6

Fellow Las Vegas performers were devastated to learn about the tragedy that took place in their beloved city.

Celine Dion reaction to Las Vegas massacre
photo: Twitter
7
Britney Spears' reaction to Las Vegas shooting
photo: Twitter
8
Mariah Carey's reaction to the Las Vegas shooting
photo: Twitter
9

Dozens of celebrities took a moment to pay tribute to the victims and their loved ones.

Rihanna's Las Vegas reaction
photo: Twitter
10
Kelly Clarkson's reaction to the Las Vegas massacre
photo: Twitter
11
Nick Jonas' reaction to the shooting in Las Vegas
photo: Twitter
12
Harry Styles' reaction to the Las Vegas shooting
photo: Twitter
13
Taylor Swift's reaction to the Las Vegas massacre
photo: Twitter
14
Ne-Yo's reaction to Las Vegas shooting
photo: Twitter
15
Chance the Rapper's reaction to the Las Vegas shooting
photo: Twitter
16
Paris Jackson's reaction to Las Vegas shooting
photo: Twitter
17

President Donald Trump also gave his sympathies.

Donald Trump's tweet about the Las Vegas shooting
photo: Twitter
18

Hillary Clinton reached out to everyone affected by the "cold-blooded massacre."

Hillary Clinton's reaction to the Las Vegas shooting
photo: Twitter
19

Former president Barack Obama posted his own thoughtful tweet.

Barack Obama's tweet about the Las Vegas shooting
photo: Twitter

Senseless tragedy, indeed.