Close to 30 children and adults were feared dead in Newtown, Connecticut, when a gunman opened fire at Sandy Hook Elementary School on Friday. As news of the tragic shooting broke, celebrities took to Twitter to express their disbelief and send condolences and prayers to the victims and their families.

Rihanna and Missy Elliott were heartbroken by the senseless murders, while Solange and Keri Hilson called for gun reform. As a father himself, Game shared his worries about his children’s safety at school.

Read some of the heartfelt messages below.

Kelly Rowland: I am truly heartbroken by the events unfolding in Connecticut. No family should have to experience the loss of a loved one due to an act of senseless violence. My prayers are with the victims and their families through this very tough holiday season.

Solange: I am so deeply saddened, and angry at what has happened at Sandy Hook in Newtown. New gun laws MUST happen. This is devastating.

Game: You can’t even send your kids to school without worries of something tragic happening these days… Condolensces to the parents in mourning.

Lil Wayne: Prayers for those in Connecticut…senseless.

Ameriie: Such a tragedy. There are disturbed ppl all around the world, but why does it happen so often in the U.S.? Is it us? Or our gun laws? Both?

Snoop Dogg: Sending love 2 the families in Connecticut for their tragic loss. 2day I bow my head in sadness

Keri Hilson: It’s time to re-evaluate those gun laws you spoke about, @BarackObama. Prayers for surviving children & families in Newtown, Connecticut.

Jay Sean: just heard about the tragic incident in Connecticut. it makes me ill to think there are such sick minded people that we have to live amongst

?uestlove: peace be with the parents. peace be with the traumatized children who witnessed this act. peace be with the teachers. bless us all.

Missy Elliott: #PrayersforSandyHookElementary this is devastating! So Traumatic for these kids and parents keep them in our Prayers!!!

Dawn Richard: Praying for Connecticut… This is horrible… #Wemustdobetter

Mack Maine: I can’t believe it and don’t understand it…..my prayers go out to the parents, families, classmates, teachers and innocent kids..Damm

Rita Ora: Wow this is horrific everybody in Connecticut the children my love and the bots love goes out to you #isthereanyhopeleft

Trey Songz: At a loss for words. We can only pray.

Lil’ Kim: I’m shocked and saddened to hear about this school shooting. My thoughts and prayers are with the victims and their families. #PrayForNewton

Asher Roth: This is really, really bad. Even the children that survived will be traumatized for life. Sending love to Newtown, CT.

Timbaland: these killings have to stop

Jordin Sparks: Those precious children…I will never understand the evil in this world. On my knees praying for those families. I am in tears.

Karrueche Tran: Shocked, heartbroken, and disgusted by the school shooting incident. What in the hell has this world come to?

Skylar Grey: This school shooting is horrible news…so heartbreaking. I don’t understand what compels someone to do that.

Rihanna: God have mercy!!!! No one deserves this! Praying for the families of the victims of the Connecticut shooting!! What a Christmas it will be

Tyler, the Creator: Damn. =( … Playing GTA Is Gonna Feel A Little Weird Right Now

LeToya Luckett: I am heartbroken after hearing about the elementary school shooting today. Praying for the families of all of the innocent children.

Kim Kardashian: In total shock over the school shooting in Ct! 18 children shot dead & 9 adults by a father of one of the kids! What has this world come to

Big Boi: What is this world coming to , such Evil and wickedness

Britney Spears: My heart is with the children and families of Connecticut today… #PrayForNewton

Karmin: Just can’t believe this. When will it stop? Please #PrayForNewtown

JoJo: I will NEVER understand such horrific violence. God help us all. Please pray for victims, loved ones, & all those affected by CT shooting.

Wale: Hol up… Wtf?!!!???? This is unreal … This is a sick world we live in

Teairra Mari: Prayers go out to the family & friends affected by the tragic school shooting in Newton, CT. May God comfort them during this time.

Shanell: 18 children and 28 people total dead at Ct. school shooting? So, so sad. My prayers are w/ everyone affected.

Eve: Truly sickened and saddened by the shooting in Connecticut. My heart and prayers go out to the parents and families of all those children.

Diddy: No words. So upset. My heart and prayers go out to all parents family and friends. Sooo sad. God pls help them threw this. GOD pls!

Bruno Mars: Sickened by this horrible news in Connecticut. My prayers are with those families.

Alicia Keys: My heart is so heavy right now as I think of these innocent children, teachers, their families and community…..