Special counsel Robert Mueller is probing Jared Kushner's efforts to get foreign investors beyond Russia to provide financing for his company during the presidential transition, including in China, CNN reported Monday.

The probe was previously only said to have focused on the Russia contacts of President Donald Trump's senior adviser and son in law, only with the campaign's data analytics and Kushner's ties with disgraced ex-national security adviser Michael Flynn.

Mueller's team is probing Kushner's conversations during the presidential transition to get financing for the Kushner Companies-backed 666 Fifth Avenue office building in New York after financial setbacks, CNN said, citing people familiar with the investigation.

CNN said Mueller's investigators have yet to contact Kushner Companies or request interviews with its executives, and the reasons behind the focus on the outreach to foreign investors are unclear.

Kushner played a leading role in the presidential transition team's contacts with foreign governments, and has indicated he spoke during that time with more than 50 contacts from over 15 countries.

One week after Trump's November 8, 2016 election, Kushner met with the chairman and other executives from the Chinese group Anbang Insurance to encourage investment in 666 Fifth Avenue, The New York Times has reported. But that deal failed.