A photo taken on August 19, 2013 shows a worker checking oil tanks at an oil well near Tioga, North Dakota.

Oil slipped on Thursday as new details connected to the impeachment inquiry into U.S. President Donald Trump weakened demand sentiment while moves to quickly restore Saudi output after attacks on its oil infrastructure promised more oil supply.

The U.S. House Intelligence Committee released a declassified version of a whistleblower report alleging Trump used his office to solicit interference in the 2020 presidential election from a foreign country.