Harvard said on Saturday the Trump administration was "doubling down" on far-reaching demands on the university despite a published report that government officials had sent a letter spelling out those demands without authorization.

The Trump administration has threatened to revoke Harvard University's ability to enroll international students, ramping up conflict between the institution and Washington.

President Donald Trump's administration said on Friday it sought Harvard University's records on foreign funding going back a decade and on some foreign ties, in the government's latest escalation against the educational institution.