Italy has said, "Those responsible will pay", whose reports that the daughter of North Korea's former ambassador in Rome was being forced back to Pyongyang after her father was hiding.
Jo Song-Gil and his wife fled the embassy in Rome without notice at the beginning of November, weeks before his mandate was closed, and suspected a degradation of a senior North Korean official.
Thae Yong-ho, a former North Korean diplomat who was rejected to South Korea while serving as Deputy Ambassador in London in 201
Thae told South Korean news agency Yonhap: "I do not know exactly how many children Jo had, but the one who stayed in Italy has been sent back to North Korea. Jo is currently with his wife."  In January, Thae called on Seoul to bring Jo to South Korea.
He added: "I can no longer publicly tell Jo to come to South Korea. The amount of punishment imposed on those whose family members fled to South Korea is incomparable with those whose family fled to other countries."
Politicians with Italy's five-star movement has called on their coalition partner, Matteo Salvini, the interior minister and head of the league to clarify the report.
Head of Foreign Affairs Manlio Di Stefano said that if the report was confirmed, the case would have been of "unprecedented difficulty".
"Those responsible will pay," he added.
Maria Edera Spadoni, Vice President of Parliament's Lower Parliament, said: "North Korean intelligence grabbed the daughter of the North Korean ambassador Jo Song gil on Italian soil? This is a serious incident. Matteo Salvini must report to Parliament as soon as possible."
In January, South Korea's JoongAng Ilbo newspaper reported that Jo had applied for asylum to an unknown western country.
At the time, the Italian press reported that Italy had not received an application for asylum from a North Korean official.
Jo, 48, had served as an ambassador in Rome since October 2017, after Italy expelled the former ambassador, Mun Jong-nam, in protest against a nuclear test by North Korea in contravention of UN resolutions.
North Korean diplomats serving abroad are often required to leave several family members – typically children – to counter deficiencies. But Jo came to Rome in May 2015 with his wife and children, suggesting he may be from a privileged family.
The alleged repatriation comes as US President Donald Trump and North Korean leader Kim Jong-un prepare for their second summit expected to be held in Vietnam in late February.