US President Joe Biden has apologized to Native Americans for the federal government-funded Indian boarding schools that abused Indigenous children and forced them to assimilate over a 150-year period, terming it as "one of the most horrific chapters in American history," CNN reported.

After calling for a moment of silence to "remember those lost and the generations living with that trauma," Biden in Laveen, Arizona said, "Quite frankly, there is no excuse that this apology took 150 years to make."