PHILADELPHIA (CBS) -- Gas prices went up again overnight in the Philadelphia region. Prices are quickly closing in on $5 per gallon.

In the five-county Philadelphia area, a gallon of regular is now averaging about $4.86. That's a jump of 7 cents from Tuesday.

Drivers in New Jersey are paying $4.68. And in Delaware, the price per gallon is $4.59.

Some drivers in the Philly area are already paying well over $5 per gallon. We found gas for $5.24 at a station on Spring Garden Street in Philadelphia.

Experts blame supply issues, combined with higher demand for the rise in prices.

They warn that drivers may be paying $6 per gallon by the end of the summer.

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