President Clinton addressed the nation on Tuesday evening following a Colorado high school massacre which may have left up to 25 dead.
The President urged the nation to allow grieving families breathing time before all the facts behind the attack are disclosed.
He said the nation's prayers were with the bereaved.
In the meantime, a federal crisis response team will be sent to offer counselling to victims' friends and relatives.
President Bill Clinton on Tuesday deplored the mass slaying of students at a Colorado high school saying the federal government will provide any assistance needed to deal with the tragedy.
As many as 25 persons may have been killed in what police call an apparent "suicide mission".
Two young men opened fire at a Littleton high school which police fear may have left as many as 25 people dead.
Shots bounced off lockers as the gunmen opened fire around 11:30 a.m. MDT (1730 GMT) with what students said were automatic weapons.
One girl was shot nine times in the chest.
The gunmen - both juniors at Columbine High School - were found dead of self-inflicted gunshot wounds, with what appeared to be bombs around their bodies, a sheriff's spokesman said.
A third person was led away in handcuffs.
Several students said the killers - believed to be former students at Columbine High School - were gunning for minorities and athletes.
Since 1997, a series of school shootings have led to calls for tighter security and closer monitoring of troubled students.
"That we only partly understand what is happening, we do know that we must do more to reach out to our children and teach them to express their anger and to resolve their conflicts with words not weapons. And we do know that we must do more to recognize the early warning signs that are said before children act violently.
SUPER CAPTION: U-S President Bill Clinton
"To the families who have lost their loved ones, to the parents who have lost their beloved children, to the wounded children and their families, to the people of the community of Littleton, I can only say tonight that the prayers of the American people are with you. Thank you very much."
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