WASHINGTON — President Donald Trump warned North Korea it could face “fire and fury” if it threatens the United States, after a new report Tuesday said U.S. intelligence officials believe Pyongyang has successfully produced a nuclear warhead that can fit inside its missiles.

Washington’s alarm over North Korean leader Kim Jong Un’s pursuit of a nuclear capability has intensified after the North conducted two tests of intercontinental ballistic missiles last month.

“North Korea had best not make any more threats to the United States. They will be met with fire and fury like the world has never seen,” Trump said during a briefing on opioid addiction at his golf course in Bedminster, New Jersey.