U.S. President Barack Obama has announced that American advisers helping with the mission to capture Joseph Kony will remain in East Africa to "bring this madman to justice.".

USA Today reports that Obama made the remarks at the United States Holocaust Memorial Museum during a speech on efforts to prevent human atrocities.

Videos on Kony and his crimes, including child kidnapping, rape and mutilation, have gone viral, putting more pressure on Obama and other governments to capture him, the report says.

Obama deployed about 100 U.S. special forces to help Uganda and other regional governments eliminate the threats of Kony and the LRA, whose crimes include child kidnapping and rape.

"It is part of our regional strategy to end the scourge that is the LRA, and help realize a future where no African child is stolen from their family and no girl is raped and no boy is turned into a child soldier," Obama said in his speech.

AFP reports that none of the US troops have been out in the bush with soldiers searching for the LRA leader.

But, the AFP reporter was told "they communicate regularly with surveillance planes they say are flown - sometimes at night - by Americans and have seen their supplies and morale boosted in recent months".