The country’s automobile registrar told the importer based in northern Vietnam to take the app out of Chinese-made cars it distributes in the country, said Nguyen To An, head of motor-vehicle quality in the registration office.

The maps showed the nine-dash line reflecting China’s disputed claim to sovereignty over about 80% of the South China Sea.

The app ban in Vietnam is part of a widening crackdown by Southeast Asian countries against depictions of disputed territorial delineations.

Last week, Vietnamese officials ordered cinemas to halt screenings of “Abominable,” a DreamWorks Animation feature that showed the nine-dash line on a map.

The animated movie also drew calls for a boycott against Dreamworks in the Philippines and was withdrawn from a scheduled debut in Malaysia over the map.

Last week, the news website VnExpress reported that the Saigontourist Travel company was slapped with a US$2,150 fine for circulating tourism brochures issued by a Chinese city with the nine-dash line included.

Vietnam, which fought a war with its fellow Communist country along their land border in 1979, has been among the nations pushing back against Beijing’s territorial claims in the South China Sea.

China’s nine-dash line encompasses waters the US has said could contain unexploited hydrocarbons worth US$2.5 trillion.