World crude oil prices jumped to a nine-month high on Monday, after Iran said it had halted crude exports to Britain and France in an escalation of a dispute over Iran’s nuclear program.

U.S. Markets were closed for the Presidents Day holiday, but in electronic trading, benchmark crude in New York was over $105 per barrel.

Brent Crude in London was over $121/barrel.

Gas prices are also higher, with retailers all over St Joe offering self-service regular for $3.35.9 per gallon.

The national average was $3.65.5 on Monday according to Triple A. That’s up from $3.55 on Sunday, $3.51 a week ago, $3.38 a month ago, $3.16 a year ago. Experts say the national average could reach a record $4.25 a gallon by late April.

In Missouri the average was $3.34.7. The Kansas average was up to $3.42.8.