Authorities in Greece say a wildfire north of Athens has halted traffic on a section of the country’s main highway.

Cars were being redirected to secondary roads near the town of Martino, some 125 kilometers (78 miles) northwest of Athens, as dozens of firefighters worked in the area on Friday afternoon.

Two water-dropping planes and a helicopter were deployed to help the ground operation.

The highway connects Athens to Greece’s second-largest city, Thessaloniki.