Oil prices fell by more than 4% on Tuesday on concerns about whether U.S. Congress will pass the U.S. debt ceiling pact and as mixed messages from major producers clouded the supply outlook ahead of the OPEC+ meeting this weekend.

Brent crude futures fell 4.58% to $73.54 a barrel. U.S. West Texas Intermediate (WTI) crude was down $4.42%, from Friday’s close, to $69.46 a barrel. There was no settlement on Monday because of a U.S. public holiday.