OKLAHOMA CITY (AP) — Gas has dropped below $2 a gallon at a handful of stations in Oklahoma and Texas this week, a level that a price-watching group says is the lowest in the nation and a bargain that’s proven irresistible to some long lines of drivers coming from miles away to fill up.

Patrick DeHaan with GasBuddy.com said early Friday that three Oklahoma City stations were the only ones in the United States with sub-$2 gas. A Texas station also later dropped its price below that level.

OnCue Express in Oklahoma City lowered its price to $1.99 earlier this week. Nearby stations followed suit.

The nationwide average for a gallon of gas is $2.71, nearly $1 below this year’s peak of $3.70 in June. Gas hasn’t been this cheap since October 2010.