Celebrities have taken to Twitter to share their thoughts about the school shooting at Sandy Hook Elementary School on Friday in Newtown, Conn. Reuters

The suspected shooter at an elementary school in Connecticut was identified in various media reports as Ryan Lanza, but new reports indicate that the gunman was actually his brother, 20-year-old Adam Lanza.

Initial reports named Ryan Lanza of Hoboken, N.J., as the gunman responsible for the shooting at Sandy Hook Elementary School in Newtown, Conn. However, police in Hoboken were reportedly questioning the 24-year-old sibling, who is not a suspect, according to The New York Post.

Sources told The Post the alleged shooter was actually Adam Lanza, 20, who open fired on a classroom leaving 26 dead, including 20 children. The Post reported that Lanza's mother, Nancy, was a teacher at the school, and that he shot her kindergarten class after having a "dispute with her."

The New York Times also confirmed the identity of the shooter as 20-year-old Adam Lanza, according to law enforcement officials. Police also told NBC another Lanza family member was found dead at a Newtown home.

Authorities are questioning 24-year-old Ryan Lanza about his brother Adam's actions.

Initially, a Facebook page for Ryan Lanza of Hoboken, N.J., was used by many media outlets, including Slate, to identify the shooter. However, Ryan Lanza was only questioned by police after the shooting, which was allegedly conducted by his brother Adam Lanza, whose body was found inside the school.

Police said Lanza was found dead inside the school building after using a high-powered .223-caliber assault rifle in the shooting. He was reportedly wearing dark clothing, a mask, and a bulletproof vest, and initial reports said he was carrying a total of four guns. Police have not given a cause of death or the manner in which it happened.

Police responded to a 9:41 a.m. emergency call after students reported a shooting at the school. Witnesses said they heard multiple gunshots and were instructed to hide, NBC reported.

The shooting is one of the worst school shootings in history, alongside such tragedies as the shootings Virginia Tech and Columbine High School.

“The majority of those who died today were children, beautiful little kids between the ages of 5 and 10 years old,” a visibly distraught President Obama said during a press conference, pausing for long periods at a time.

“They had their entire lives ahead of them: birthdays, graduations, weddings, kids of their own," he continued, wiping away a tear.