Celebrities have taken to Twitter to mourn those who lost their lives, were impacted or moved by the school shooting at Sandy Hook Elementary School on Friday in Newtown, Conn.

While police reports have not yet released the civilian casualty information, news outlets like CNN are estimating that as many as 25 people, 18 of which may include children, were killed in the shooting. Many others were injured but an official number was not given by police. Unconfirmed reports also said the principal Dawn Hochsprung and a school psychologist were killed in the shooting, as well.

Connecticut State Police initially identified the shooter only as a 20-year-old male, who was dead inside the school building after using a high-powered .223-caliber assault rifle.

However, recent reports indicated the shooter was 24-year-old Ryan Lanza, who was found dead on the sight of the shooting. He was reportedly wearing dark clothing, a mask, a bulletproof vest and carrying a total of four guns. Police have not given a cause of death.

Unconfirmed reports said Lanza had a connection to the school and both of his parents were reportedly dead.

The shooting began around 9:40 a.m. inside of the elementary school where an estimated 600 students in grades K-4 were present.

Lt. J. Paul Vance said the scene of the shooting was secure and the police are in "search warrant activity."

“The scene is secure. The public is not in danger,” says Connecticut State Police spokesman Paul Vance.

As one of the deadliest school shootings in history, celebrities have taken to Twitter to share their condolences for the tragedy.

--

Adrienne Maloof: Terrible terrible news about the shooting in Connecticut. Sending thoughts and prayers to everyone involved…. 

Alyssa Milano: What the f*ck is wrong with people? 

Andy Cohen: This is too sad for words. 

Ashley Greene: Some things are just bigger than me and impossible for me to understand. My thoughts and prayers are with the families in Connecticut. Audra McDonald: No words. #prayfornewton 

Bethenny Frankel: MONSTER. Those poor helpless children & babies. I don’t remember hearing something so evil 

Blake Shelton: The killing of defenseless people and innocent children. I’m sad and sickened. This is why we all should be prepared to defend and guard. 

Brandi Glanville: I can not believe this school shooting, what is wrong with people!!!! My heart is breakking for the kids and families. 

Chad Johnson: Just seeing my news feed on the Connecticut shooting, what is going on, prayers to the families and students involved. 

 Christina Applegate: There are just no words. Only sorrow. We are all shedding tears today for those families. 

Courteney Cox: Praying for Sandy Hook 

Craig Ferguson: Terrible news story today. Please forgive edit in tonight’s pretaped show because it’s not such a great day for America. 

DJ Pauly D: My Prayers Go Out To Everyone Affected By This Horrible Shooting In Connecticut 

Elisabeth Hasselbeck: Please #prayfornewtown. Praying with you. #whyGodwhy 

Giuliana Rancic: This tragedy is beyond heartbreaking. Imagine how excited these little kids were for the holidays. Why? Why? Why? Tragic and senseless. 

Hilary Duff: Oh my.I am shocked.Heartbroken.Devastating news about this elementary school 

 Ian Somerhalder: We are sad.Our hearts,thoughts&help are w/you.Im so sorry to all affected by this.So sorry.May all thelove in the world hug you in this time

Jenny McCarthy: Cant stop crying. My heart goes out to these familes. 

Jesse Tyler Ferguson: I’m sick to my stomach about the tragedy at Sandy Hook Elementary. All my thoughts are with the community of Newtown, CT. J

Joan Rivers: Hearing the news of the sad tragedy in CT. I’m horrified and heartbroken – my thoughts and prayers are with the victims and their families. 

Joe Jonas: Please Pray for everyone in Newtown, Connecticut. 

John Stamos: soulless coward pulls trigger, children die, officials express regret and then what -we wait for the next shooting? how do we stop this?

Josh Duhamel: My heart hurts for the victims & their families of the CT school shooting. This needs to stop. Schools must be safe again. 

Joy Behar: My thoughts and prayers are with the families of Sandy Hook Elementary. 

Kate Walsh: Horrible. My thoughts and prayers go out to the children in newton and their families. 

Katherine McPhee: I’m so saddened over the shootings in CT. In light of such an evil act, #PrayForNewton. 

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

Khloe Kardashian: I am sick to my stomach. 18 children and 9 adults lives were stolen today. I’m so sorry for the sadness and pain this has caused. PRAY 

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 

Kirstie Alley: No comprehension of such insanity, violence and evil… 

Kourtney Kardashian: If this tragedy doesn’t change something in this country regarding guns…I just want to scream and cry. Deeply saddened. Praying 

Kristin Chenoweth: Well im hearing about this shooting in CT. Praying. Sending prayers. 

Larry King: This is a double horror story-the horror of the senseless deaths & that this continues 2happen in this country

Lindsay Lohan: This is absolutely horrifying. Our thoughts and prayers go out to the families in Newton, CT. So unbelievably sad. 

Malin Akerman: My heart goes out to all the victims and families of #SandyHook elementary school. Unbelievably sad. 

Maria Menounos: Heartbreaking.As many as 20 children shot by gunman this morning at a CT elementary school.Multiple fatalities reported. #Connecticut #pray 

Martha Plimpton: Call your representatives and ask them to make #GunControl a priority TODAY 

Mia Farrow: Gun control is no longer debatable- it’s not a ‘conversation’- It’s a moral mandate. ‘ 

Michael Moore: Only minutes away from pundits & politicians say, “This isn’t the time to talk about gun control.” Really? When is that moment? 

Miranda Lambert: I’m praying for those babies and all the victims of the Connecticut shooting. May God bring peace to the families. 

Piers Morgan: Don’t just mourn these poor dead children America – get angry and do something to stop these senseless shootings happening.

 Randy Jackson: Thoughts and prayers go out to those in Connecticut 

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

Sarah Silverman: Band-Aids-on-Band-Aids @NRA people want MORE access to guns to combat all the people w access to guns. 

Sherri Shepherd: My heart is broken for the parents, family & faculty of #SandyHook Elementary School… can’t stop praying & crying. Such a senseless act 

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

Sophia Bush: My heart aches for Connecticut ….

 Steve Carell: Pray for Sandy Hook, Newtown CT. 

Vinny Guadagnino: Praying for the Victims in the Connecticut school shooting. This is happening too much .

To contact the editor, e-mail: