U.S. President Joe Biden said on Thursday that he was pardoning 39 people convicted of non-violent crimes and commuting the sentences of nearly 1,500 others who were serving long prison terms.

The moves come over a week after the president signed an unconditional pardon for his son Hunter.

Officials said last week that the White House was listening to demands for Biden to extend the same grace to thousands of people wronged by the U.S. judicial system.

Biden said the people he granted clemency would have received shorter sentences if charged under today's laws, policies and practices.

"As president, I have the great privilege of extending mercy to people who have demonstrated remorse and rehabilitation, restoring opportunity for Americans to participate in daily life and contribute to their communities, and taking steps to remove sentencing disparities for non-violent offenders, especially those convicted of drug offenses," Biden said.

The president added that he will take more steps in the weeks ahead and that his administration will continue reviewing clemency petitions.

The commutations announced were for those who were placed on home confinement during the COVID-19 pandemic to mitigate the spread of the virus, experts say.

"We want Biden to look at those people and consider using his power even more in the upcoming weeks," said Tierra Bradford, senior program manager at The Leadership Conference on Civil and Human Rights.

U.S. Representative Ayanna Pressley of Massachusetts, one of the leading Democrats behind a letter to Biden last month urging him to issue clemency to Americans with nonviolent offenses, commended the president for taking "meaningful and historic action."

Her statement noted that he could take further steps to exercise his power during his remaining 39 days in office.

The White House said the clemencies granted by Biden were the most ever in a single day.

"The president takes this very, very seriously, and is going to review all options, especially the clemency petitions," White House press secretary Karine Jean-Pierre said.