NEWTOWN, CT (RNN) – The first two funerals for children who were victims of the Sandy Hook Elementary School shooting have been scheduled for Monday.

Jack Pinto and Noah Ponzer, both 6, will be laid to rest following private ceremonies for family and friends, according to WFSB. More funeral and memorial services are expected in the coming days for the other 18 children and seven adults killed by 20-year-old Adam Lanza.

Authorities continue to investigate the murders that took place Friday. WFSB reported Connecticut State Police found Lanza had hundreds of rounds of expanding ammunition designed to do maximum damage when it strikes a target.

He credited the quick response of emergency personnel and the school's staff for preventing more tragedies.

"There was a lot of ammo," Lt. Paul Vance said. "Certainly a lot of lives were potentially saved."

Vigils have been held across the state and the country since Friday in remembrance of the victims, and people have been encouraged to wear green and white – the school's colors – in an act of support.

Schools throughout Connecticut began classes again Monday, many with an increased police presence, according to multiple city leaders. In Newtown, school officials have not said whether Sandy Hook Elementary will ever be reopened, according to the Associated Press.

People in the town of Monroe began preparing the Chalk Hill School, closed last year, for students of Sandy Hook, according to WFSB. The school is expected to be ready later this week.

On Sunday, President Barack Obama met with residents of Newtown, including survivors of the shooting and family members of the victims. He also spoke at an interfaith ceremony, reading the children's names and saying "God has called them all home."

Obama told the distraught community that the nation shared in their grief and called them an inspiration for the way they came together to support each other. He also said he would work to prevent future tragedies from happening.

"If there's even one step we can take to save a child, or another parent or another town … then surely we have an obligation to try," Obama said.

Lanza's father, Peter Lanza, released a statement Saturday. He said his family had been cooperating with authorities and would continue to do so.

"Our hearts go out to the families and friends who lost loved ones and to all those who were injured. Our family is grieving along with all those who have been affected by this enormous tragedy," Peter Lanza said in the statement. "No words can truly express how heartbroken we are. We are in a state of disbelief and trying to find whatever answers we can. We too are asking why."

The shooter's first victim appears to be his mother, 52-year-old Nancy Lanza. She was shot multiple times while lying in her bed at home, according to police.

Police said the gunman shot his way into the school, past secured doors, and went on a rampage that lasted about 10 minutes. He used a semi-automatic Bushmaster AR-15 rifle, a Glock 10mm handgun and a Sig-Sauer 9mm handgun, according to Vance.

Law enforcement also found a shotgun inside Lanza's car. They said Lanza died of a self-inflicted gunshot wound inside the school when officers began to move in.

It was the second deadliest school shooting in American history. No specific information has been released about the motive of the shooter, although there have been multiple reports he suffered from mental illness.

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