The US and Iran do not maintain diplomatic relations, and communications between the two nations are passed along by Swiss diplomats.
She reported her son's disappearance after he failed to return in July but learned from the State Department only three weeks ago that he was being held in Iran.
A Department of State spokesperson told the BBC: "We are aware of reports of the detention of a U.S. citizen in Iran".
"His arrest was communicated early through Interests Section of The Islamic Republic of Iran to the United States government".
White's family said he suffers from acute asthma and shortly before his latest visit to Iran he underwent chemotherapy for a neck tumour.
Iran had not confirmed the arrest before the state news agency IRNA carried a statement by foreign ministry spokesman Bahram Qassemi on Wednesday, which did not specify when it had happened or what crime he was accused of.
White said she did not intend to release further details because she was anxious about the complexity of her son's case in Iran.
"The case of this person is being handled by the relevant authorities and at the conclusion of this process they will issue the necessary information", Ghasemi was further quoted as saying on his Telegram account.
Ghasemi denied allegations that White, who hails from Imperial Beach, California, has been mistreated in prison.
Xiyue Wang, a China-born U.S. citizen and Princeton University graduate student, was detained in August 2016 while doing scholarly research and studying Farsi, the university said.
"I'm very anxious about his health", White's mother told CBS on Tuesday.
New details are emerging about an American Navy veteran being held captive in Iran.
White is the fourth American known to be held by Iran, according to CBS News. Wang was sentenced to 10 years in prison after being convicted of spying, the Iranian government said in 2017.
President Trump's hardline stance - exiting the nuclear deal and sanctioning Iran - has not stopped it from continuing to detain three other Americans, including Siamak Namazi and his 82-year-old father.
The last time Iran released any imprisoned Americans was when the worldwide accord on Iran's nuclear programme took effect in January 2016.
Christine Levinson's husband, former Federal Bureau of Investigation agent Bob Levinson, has been missing in Iran since 2007.
The Romanian could face Venus Williams in the third round and Serena Williams is a potential last-16 opponent for the top seed. Roger Federer and Caroline Wozniacki enter the year's first Grand Slam as the reigning singles champions of the tournament.
Mayhew is an animal welfare charity which helps cats and dogs through community initiatives and veterinary care. Two of the patronages Meghan now has formerly belonged to the Queen and have been handed over to the Duchess.
Some observers have suggested that Kabila's government sought to make a deal as hopes faded for a win for Shadary. Candidates can appeal results if they wish and the final decision will be announced by the constitutional court.
Bloomberg reported that Trump is eager to strike a deal to boost markets, citing people familiar with White House deliberations. The truce came after the two sides imposed import duties on more than $300 billion of each other's goods.
Kelly is reportedly being investigated in multiple jurisdictions following the release of a Lifetime docuseries, " Surviving R. She felt compelled to make a public statement to aid victims after her office was inundated with calls to take action.
He added that the Trump administration is working to make the shutdown "as painless as possible, consistent with the law". The IRS said it will recall a "significant portion" of its roughly 52,000 furloughed employees to work on tax returns.
The Golden Globes kicked off the Hollywood awards season leading to the Oscars , where nominations will be announced on Jan 22. He may have been left at home the night of the Golden Globes, but it was hardly a case of "out of sight, out of mind".
The coin has been described as the " most famous" coin that was made by mistake, according to Heritage Auctions . They eventually became dislodged and were fed into the coin press, along with the wartime steel blanks.
Memphis offered Parsons an opportunity with its G League affiliate but wouldn't assure him a spot on the active roster. The 30-year-old player has $38 million still left on his contract with Memphis through 2020.
The teacher is scheduled to appear in court Wednesday. "The Greenup County School District prioritizes the safety of our students. The boy's mother, Angel Nelson, told CNN on Monday that her son was removed from a classroom after he had an outburst.
New Mercedes-Benz CLA: second-generation model revealed!
Mercedes-Benz have also developed a system by which MBUX only responds to the last person to have said "Hey Mercedes". The Energising package introduces the Mercedes-Benz vivoactive 3 Smartwatch developed in collaboration with Garmin.
Djokovic, Federer on opposite sides of Australian Open draw
Top seed Novak Djokovic , who like Federer is bidding for a record seventh title in Melbourne , will take on a qualifier. And with No. 6 Marin Cilic in the same quarter, there's potential for a rematch of the 2018 final a few rounds early.
Amazon CEO Jeff Bezos and wife divorcing after 25 years
She has released two novels, the first of which, The Testing of Luther Albright , collected an American Book Award in 2006. Jeff Bezos also bought a mansion in a swanky Washington D.C. neighbourhood past year for $US23 million.
Mysterious repeating radio bursts baffle physicists
A repeating FRB , however, provides more opportunities for scientists to learn about these radio bursts and where they come from. We may soon find out thanks to some mysterious signals that were recently picked up by a telescope in British Columbia.
Wolves considering Hoiberg for GM or head coach
Thibodeau entered the season on the hot seat, which is why he was desperately trying to keep Jimmy Butler rather than trade him. Assistant coach Ryan Saunders will assume the role of the interim head coach for the remainder of the 2018-19 season.