REPUBLIKA.CO.ID, NEW YORK -- U.S. President Donald Trump said on Thursday the United States will add more sanctions against North Korea, while U.S. allies have called for enforcing existing international sanctions as the best way to get Pyongyang to give up its nuclear weapons program.

The sanctions are not expected to further target oil, a senior Trump administration official told Reuters.

Tensions have risen in recent weeks over North Korea's nuclear and ballistic missile tests, despite intense pressure from world powers. The U.N. Security Council has unanimously imposed nine rounds of sanctions on North Korea since 2006, the latest earlier this month capping fuel supplies to the isolated state.

"We will be putting more sanctions on North Korea," Trump said in response to a question at a meeting with Afghan President Ashraf Ghani in New York on the sidelines of the annual gathering of world leaders at the United Nations.