Four people, not including the sources, claimed to have seen the photo themselves, while eight more said the recipients had spoken to them about its contents.
The report said the messages were sent several years ago and on separate occasions.
Rouhani gets Iranian supreme leader's nod as second-term president, faces risks
The deal, known as the Joint Comprehensive Plan of Action (JCPOA), was signed in July 2015 and was implemented in January 2016. The diplomat also said presidents of seven countries had arrived Iran by Thursday night to take part in the ceremony.
The allegations follow a series of sexual harassment scandals involving senior Fox News executives and on-air stars.
According to a statement from Fox News to the CBC, an investigation into allegations against the television host is underway.
Former Fox anchors Megyn Kelly and Andrea Tantaros also accused Mr Ailes, who died aged 77 in May, of sexual harassment following his shock departure. When referring to the first female pilot in the United Arab Emirates during a segment on "The Five" in 2014, he said on air that it might be better to characterize her as "boobs on the ground" rather than "boots on the ground".
Primetime commentator Megyn Kelly also left Fox News this year, reportedly partially because she was upset by O'Reilly's criticism of her for publicly commenting on the sexual harassment she faced at Fox News, The New York Times reported in April.
Gunman wounds three at San Francisco park packed with families and tourists
He says several park regulars confronted the group and that he approached them to make sure everything was OK. She said to the newspaper that she heard popping sounds that she first associated with fireworks.
NBC News was not able to independently verify the allegations.
The law firm of Paul Weiss is conducting the investigation and rotating substitute hosts will fill in for Bolling on The Specialists and Cashin' In, according to Fox News.
Is Eric Bolling going to be next?!?! He is an avid defender of President Donald Trump and has frequently drawn praise from the president.
Fox News recently renewed Bolling's contract.
The CW schedules 2-night event for 4-series Arrowverse crossover
The dates for The CW's 2017 crossover event between Supergirl , Arrow , The Flash , and Legends of Tomorrow have been announced. The special will conclude the very next night on Tuesday, November 28th with The Flash and DC's Legends of Tomorrow .
NPR received a statement from Fox News about the issue.