The United States Ambassador to Nigeria, James Entwistle, says there is proof that three members of the Nigerian House of Representatives were seen acting inappropriately in the US.
Mr Entwhistle is to present video evidence against them for alleged sexual misconduct.
Two All Progressive Congress (APC) lawmakers, Mohammed Gololo and Mark Gbillah, and one Peoples Democratic Party (PDP) lawmaker, Samuel Okon, were alleged to have solicited for sex and sexually harassed a hotel housekeeper in Cleveland, Ohio.
The US Ambassador in a petition to the Speaker of the House of Reps, Yakubu Dogara, said their actions brought disrepute to the parliament.
The House Committee on Ethics and Privileges, chaired by Ossai Ossai has been assigned to probe the matter.
The three lawmakers were attending the International Visitor Leadership Programme in Ohio, from April 7 to 13, 2016, when the incident occurred.
The Minister of Foreign Affairs, Geoffrey Onyema is also expected at the hearing.
