Twenty-nine people are feared dead at the Sandy Hook Elementary School in Newtown, Connecticut. Associated Press confirmed twenty-seven people, including 18 children, have been killed in a shooting.

The gunman is believed to Ryan Lanzla, according to Huffington Post. Lanza, 24, is suspected of killing at least 26 people -- 8 adults and 18 children - in a rampage that is considered the worst school shooting in history.

According to New York Times, Lanza walked into a classroom that was being taught by his mother. He shot and killed her, her eighteen students and more people before presumably turning the gun on himself.

An entire classroom of students is unaccounted for at the school attended by children grades kindergarten through fourth grade.

 "She described it as a 'Pop, pop, pop,'" a source told CNN.com. "She said three people went out into the hall and only one person came back, the vice principal, she said, who was shot in the leg or the foot, who came crawling back. She cowered under the table and called 911. She never saw the shooting. There must have been a hundred rounds." 

One of the feared victims is believed to be the school principle, Dawn Hochsprung, 47 in addition to the school psychologist, Daily Mail Online reports. The mayor is holding off releasing the identities of the victims untik are next-of-kin are contacted.

Lanza reportedly entered the school administration office around 9:40 a.m. That is when police received the first 911 call.

He was dressed in dark military-style clothing, a mask, a bulletproof vest, and was carrying four weapons, including two handguns and a .223-caliber rifle. He fired over 100 times.  Police have recovered two weapons from the suspect, a Glock and a Sig Sauer, the source told CNN.

The gunman is now dead, with his body in a classroom, a source told CNN. It is unclear if he shot himself or was brought down by an officer.  

One of his parents was found dead at his New Jersey home around 2pm.

After hundreds of officers and police dogs had searched and surrounded the area, a second man was found in the nearby woods and taken into custody after being seen running from the school directly after the shooting. Police have cordoned off a black Honda with New Jersey plates believed to belong to the dead shooter in the search, Daily Mail Online reports.

None of the victims have been identified. The mayor said they are not releasing names until next-of-kin have been notified.

White House spokesman Jay Carney told CNN that said President Obama feels "enormous sympathy" those affected directly to the tragedy. Obama will address the shooting on Friday.

Watch President Obama speak at the press conference now.