Washington (CNN) The intelligence behind the US ban on laptops and other electronics is considered so highly classified that CNN, at the request of US government officials, withheld key details from a March 31 story on the travel restrictions.

Some of those details are once again at issue following The Washington Post report Monday night that President Donald Trump shared highly sensitive information with two top Russian diplomats in a meeting at the White House.

JUST WATCHED McMaster: President did not compromise sources Replay More Videos ... MUST WATCH McMaster: President did not compromise sources 00:54

The concern, US officials told CNN in late March, was that publishing certain information, including a city where some of the intelligence was collected, could tip off adversaries about the sources and methods used to gather the intelligence.

Over several days, US intelligence officials spent hours on conference calls making specific requests to CNN to withhold certain details of the intelligence information.

Those details included information that Trump reportedly shared in his Oval Office meeting with Russian Foreign Minister Sergey Lavrov and Russian ambassador to the US Sergey Kislyak.

Read More