Preliminary discussions are underway for special counsel Robert Mueller to potentially interview U.S. President Donald Trump as part of the probe of alleged Russian interference in the 2016 election, NBC News reported on Monday.

Citing three people familiar with the situation, NBC said lawyers for Trump had met with representatives of Mueller's office in late December to talk about the logistics of any such interview.

The discussions included the possible location and length of any interview as well as legal standards and options for its format, including written responses instead of a formal sit-down, according to the news network.