A Molotov cocktail was hurled at an Israeli car near Hebron on Wednesday, in a third firebombing incident in the area in the past two weeks.
No injuries were reported, but the vehicle sustained damage.
The IDF was scouring the area for the culprits.
On January 9, three firebombs were thrown at an Israeli bus traveling through the southern West Bank.
The incident took place near the Palestinian town of Halhul on Route 60, between Gush Etzion to Hebron.
Five days earlier, Palestinians threw four Molotov cocktails and stones at Israeli vehicles south of Jerusalem.
The incidents took place near the West Bank village of Husan, west of Bethlehem.