Unidentified attackers have burned four Coca-Cola delivery trucks in an area of Mexico's southern state of Guerrero known for drug gang turf battles.

The Guerrero state prosecutor's office said Tuesday that the attack happened in the township of Arcelia but the motive is still under investigation.

Coca-Cola's Mexico bottler, Femsa, has not responded to requests for comment.

While local distribution companies are frequent targets for gang extortion in southern Mexico, multinational firms have seldom been attacked.

In 2012, the Knights Templar cartel in the western state of Michoacan burned five warehouses and dozens of vehicles owned by the Sabritas snack company, a Mexican subsidiary of PespsiCo. The cult-like drug gang said it believed Sabritas had let law-enforcement agents use its trucks for surveillance. The company denied that.