According to CBS News, 20 children and 6 adults were gunned down this morning at a Sandy Hook Elementary, a K-4 school in Newtown, Connecticut where the shooter’s mother worked.

The gunman was identified as 24-year-old Ryan Lanza. CBS News reports that Lanza’s mother worked at the school and is among the dead. Lanza apparently targeted his mother’s classroom, said an official. Most of the shooting occurred in that classroom. Some of her students were among those killed.

Today’s tragedy falls on the heels of a Portland, OR shopping mall shooting earlier this week. According to ABC News, an estimated 31 mass-shootings have occurred since Columbine in 1999.

Artists and musicians have once again taken to Twitter to express their thoughts.

the depth of sadness

—
Flea (@flea333) December 14, 2012

We are devastated to hear of today's news in Connecticut. God bless the families and children effected by this senseless tragedy.

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AWOLNATION (@awolnation) December 14, 2012

Our hearts & good thoughts are with everyone effected by this senseless tragedy.

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  (@311) December 14, 2012

I am absolutely overwhelmed with sadness and disgust for those who seek to harm innocent children. You will pay for what you have done.

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Michael Einziger (@MichaelEinziger) December 14, 2012

“@cnnbrk: Death toll in Newtown school shooting close to 30, source says. Most are children. on.cnn.com/Zq1uF7” please stop these. Please

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Fred Durst (@freddurst) December 14, 2012

How many innocent children need to die before we "The people" make a constitutional change?

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Chad Smith (@RHCPchad) December 14, 2012

We need to find a solution to this mindless killing, can't imagine how a parent that lost a child today is feeling, my heart goes out to all

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jared watson (@jaredwatsondh) December 14, 2012

Thinking of the families involved in today's very unfortunate events

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Kevin Skaff (@Kevineffinskaff) December 14, 2012

Today is a very sad day for mankind. I personally am ashamed and hurt. My heart goes out to everyone involved in this disgusting tragedy.

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ROME (@RomeMusica) December 14, 2012

heartbreaking

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Flea (@flea333) December 14, 2012

The Conn elementary school shooting is horrific. Those poor kids. & their families. I'm speechless.

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  (@Slash) December 14, 2012

We are saddened and sickened by the awful tragedy today in CT. Our thoughts and prayers to all affected. This needs to stop. #fb

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Jimmy Eat World (@jimmyeatworld) December 14, 2012

Just heartbreaking news today.

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Dave Navarro (@DaveNavarro) December 14, 2012

Killing children is unacceptable. Violent acts of ANY KIND upon children is unacceptable.

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Rob Aston (@skinheadrob) December 14, 2012

Our hearts go out to those affected by the tragedy in #Newtown.

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No Doubt (@nodoubt) December 14, 2012

Woke up to terrible news. My heart goes out to all involved. Sorry but second amendment is clearly not working in our country. Disgusting.

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Michael Angelakos (@mangelakos) December 14, 2012

My heart + thoughts to the victims, their families, and all affected by the #Newtown school shooting. Absolutely horrifying and tragic.

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JARED LETO (@JaredLeto) December 14, 2012

Our hearts and prayers pouring out to all the victims and families suffering from today's tragedy in CT. Ther… tmblr.co/ZthjOxZKkfhX

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PEPPER (@pepperlive) December 14, 2012

how many more massacres do we have to see in my country before people start to change their minds about guns...

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dıpןo (@diplo) December 14, 2012

Deepest condolences and every one of my prayers go out to the families and people affected by what happened this morning.

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Hayley from Paramore (@yelyahwilliams) December 14, 2012

No one should have guns, not even the police.

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  (@GROUPLOVE) December 14, 2012

The White House

"While nothing can fill the space of a lost child or loved one, all of us can extend a hand to those in need" —President Obama #CTshooting

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The White House (@whitehouse) December 14, 2012

For complete coverage as the story unfolds, click to CBS Local.

– Jay Tilles, CBS Local