A spokesman for the anti-Morsi Rebel (Tamarod) campaign said that the group had refused to meet with a delegation from the American embassy in Egypt.
Mahmoud Badr, one of the founders of the movement, said on Thursday on his official Twitter account that the newly appointed American ambassador to Egypt, Robert Stephen Beecroft, had asked to meet with the movement.
"We refused the ambassador`s request and asked him to improve US relations with Egypt, Syria and the Arab countries instead," Badr tweeted.
On Friday, MENA cited Rebel spokesman Mohamed Nabawy as confirming that the group had refused to meet with a delegation from the embassy.
According to Nabawy, American diplomats have tried to meet with representatives of the group several times since the ouster of Morsi, but the movement has always refused.
The Rebel campaign, founded in April 2013, was instrumental in building opposition to the rule of Islamist president Mohamed Morsi prior to his ouster last summer.
The Obama administration nominated Beecroft, its ambassador in Iraq, to be the new US envoy to Cairo on Wednesday. His nomination must be confirmed by the US Senate.