U.S. Defense Secretary Jim Mattis said Friday that analysis continued on North Korea's most recent missile test, but he did not believe its intercontinental ballistic missile (ICBM) posed an imminent threat to the United States.

"It has not yet shown to be a capable threat against us right now ... we're still doing the forensics analysis," Mattis told reporters at the Pentagon.

Last month, North Korea said it had successfully tested a new type of ICBM that could reach all of the U.S. mainland and South Korea and U.S.-based experts said data from the Nov. 29 test appeared to support that.