At least 26 people were killed Sunday when a gunman opened fire in a rural Texas church, according to officials.

The victims ranged in age from 18 months to 77 years. At least 20 other First Baptist Church parishioners were injured in the Sutherland Springs, Texas, shooting. Ten were in critical condition as Monday.

The gunman, identified as 26-year-old Devin Patrick Kelley, was later found dead in his car due to what appeared to be a self-inflicted gunshot wound, officials said.

The massacre comes about one month after a gunman opened fire on a crowd at a Las Vegas, Nevada, concert, killing 58 people.

Here’s how you can help the victims of the church shooting:

SUTHERLAND SPRINGS, TX - NOVEMBER 06:  Law enforcement officials continue their investigation at First Baptist Church of Sutherland Springs during the early morning hours of November 6, 2017 in Sutherland Springs, Texas. Yesterday a gunman, Devin Patrick Kelly, killed 26 people at the church and wounded many more when he opened fire during a Sunday service.  (Photo by Scott Olson/Getty Images)

Credit: Scott Olson

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Credit: Scott Olson

1. Donate money to the FBC Sutherland Springs Shooting GoFundMe, which is raising money for the church victims' medical, funeral and related costs.

2. Donate money through the Guidestar-certified fund, Hardest Hit Family Relief Fund. Donations are being accepted on via the Sutherland Springs Shooting Fund GoFundMe and on the Hardest Hit Family Relief Fund website.

3. Donate money to the Holcombe Family's fund on GoFundMe. The Holcombe family lost eight family members in the Texas church shooting Sunday.

4. Donate supplies

Follow the nearby River Oaks Church in Sutherland Springs, Texas, on Facebook. Pastor Paul Buford is updating lists of what the community needs. As of Monday afternoon, there are no immediate supply needs.

5. Donate blood to local hospitals

Time.com reported a list from Connally Memoral Medical Center — where eight victims were originally sent — of where and when to donate blood in the area:

  • 1 p.m. CST to 6 p.m. CST Monday, Nov. 6 at Connally Memorial Medical Center
  • Sunday, Nov. 12 at Sacred Heart Catholic Church in Floresville, Texas
  • Sunday, Nov. 12 at St. Anthony's Catholic Church in Elmendorf, Texas
  • 9 a.m. CST to 1 p.m. CST Tuesday, Nov. 21 at Connally Memorial Medical Center

The South Texas Blood and Tissue Center is also calling for O-positive or O-negative blood donors to donate at any of their seven Texas locations.

6. Donate blood to the American Red Cross

You can also donate to the American Red Cross, which is helping out in Sutherland Springs, Texas, following the shooting.

7. Donate money to the San Antonio Medical Center and University Hospital in San Antonio, Texas, hospitals where many injured victims were transported and are currently being treated.

Be sure to share the links above on social media to spread the word.