U.S. President-elect Joe Biden says the country's national security agencies have suffered a major blow at the hands of outgoing President Donald Trump.

He added that he and members of his handover team had not received the necessary information from the US Department of Defense and other security agencies.

Joe Biden made the allegations after a meeting with his national security and foreign policy advisers.

The veteran American politician is expected to officially take over the presidency on January 20; However, Donald Trump has so far refused to accept the results and defeat of the November 3 election.

For three weeks after the official election results were announced, the Trump administration was unable to provide Biden with sensitive information about the country's security.

Joe Biden said in his Monday speech that the work of those he hired to take charge of the work of the Ministry of Defense, the Ministry of Finance and the administration has been severely hampered.

"I have not yet received any important information on national security from the government," he said. I can't call it anything but irresponsibility. ”