The lawmakers were alleged to have committed the offence when they attended the International Visitor Leadership Program in the United States recently.
The three members of the House are: Honourable Mohammed Garba Gololo, Honourable Samuel Ikon and Honourable Mark Gbillah.
Chairman, House Committee on Media and Public Affairs, Honourable Abdulrazak Namdas at a press briefing, confirmed the receipt of the letter from the Ambassador of the United States to Nigeria, Mr James Entwistle to the Speaker, Yakubu Dogara.
According to him, the House has already commence investigation into the alleged sexual misconduct. He added that the outcome of the investigation would be made known in due time.
“We are in receipt of a letter from the ambassador from the United States to Nigeria where he alleged that there is a misconduct by some members of the National Assembly that attended a programme.
“However as a responsible parliament, the leadership has received these letters and it’s doing its own investigation and it remains an allegation.
“We have our own rules and laws of the land, when investigations are concluded, we will brief you further in the issue but for now this is what I have to tell you.” he said