The former spy chief is on the run but still thought to be somewhere in Peru. On Friday, Mr Fujimori stopped off in Tokyo on his way back from an economic summit in Brunei amid rumours that he might be seeking political asylum in an Asian country. He said it was likely he would extend his visit to Japan to continue contacts with the countries economic authorities. The president, who is of Japanese descent, said on Friday he would be returning to Peru but did not specify when. The US delegation to Peru is expected to be led by Peter Romero, acting US Assistant Secretary fo State for Western Hemispheric Affairs.
Correspondents say Washington is keen to see Peru regain stability.
Mr Fujimori's political influence has been waning since a video was aired of Mr Montesinos apparently bribing an opposition politician to switch to the government party. The incident prompted Mr Fujimori to call early presidential elections in which he says he will not stand. Opposition control Earlier this week, opposition legislators wrest control of Congress from the ruling party by voting to remove its speaker and replacing her with their own representative. The former speaker, Martha Hildebrandt, was accused her of blocking attempts to investigate Mr Montesinos. Confusion about Mr Fujimori's plans has been fuelled by some ministers, who suggested he might resign even before next April's elections.