The Iranian government said it will sue Google after it removed the name of the Persian Gulf from its mapping service.
The body of water between Iran, Saudi Arabia, the United Arab Emirates, Bahrain and Qatar was left nameless after the search giant removed the tag from Google Maps.
It is not clear why Google decided to remove the name, widely referred to as the Persian Gulf, or if it was caused by a bug in the system.
It does not explain why Google Earth keeps the name tag in place.
Iran's foreign ministry spokesperson Ramin Mehmanparast warned Google could face "serious damages" if it did not return the water's name, reports the Associated Press.
Iran is culturally sensitive about the name of the Persian Gulf, which has stirred tensions between Iranians and Arabs for years. The name has been disputed since the 1960s. Some Arab states call the stretch of water the Arabian Gulf.
Both the U.K. and U.S. governments among others, including the United Nations, continue to call the water the Persian Gulf.
Tehran had previously threatened Google with legal action over removing the name. Errors in Google Maps have seen names of even highly-populated areas disappear before. In 2010, Google noted a "technical error" which left a Florida city off its map.
But Google is also proactive in changing the name of areas, places and cities for accuracy.