Celebrities such as Reese Witherspoon, Lady Gaga and Brad Paisley have shared their thoughts concerning Sunday's Texas church shooting on social media.

U.S. Air Force airman Devin Patrick opened fire on churchgoers as they attended Sunday service. Twenty-six people were killed and 20 were injured, police said.

"I'm just so heartbroken over the shooting in a Baptist church today in #SutherlandSprings Texas," Witherspoon wrote on Instagram alongside a photo of the church.

"This gun violence must end. #PrayForTexas #EnoughisEnough #callyoursenator," she continued.

"Prayers for #SanAntonio and all the families who are suffering the loss of loved ones. I'll pray also for #GunControl," added Gaga on Twitter.

"God bless you Texas. #texasstrong," said Paisley.

Britney Spears also commented, noting, "My heart breaks over the news coming out of Texas. My prayers are with the Sutherland Spring community."

"My heart just broke. Again . #SutherlandSprings Texas church shooting. Please stop the madness," shared Today anchor Hoda Kotb.