A U.S. drone has crashed in the island nation of Seychelles, just over one week since another U.S. drone went down in Iran, reports FOX News.

The U.S. Air Force has confirmed that the unarmed MQ-9 drone crashed on Tuesday. The cause of the incident is unknown and currently under investigation, the Air Force said in a statement.

The Seychelles Civil Aviation Authority (SCAA) also confirmed the incident. It reported that the plane was on a routine patrol and crashed due to mechanical failure, according to Reuters.

The U.S. embassy has not yet commented on the plane's mission.

The drone landed at the Seychelles International Airport and, according to the Air Force, the Seychelles government was immediately notified. The military is currently coordinating with officials on the removal of debris.

Seychelles is located off the eastern coast of Africa in the Indian Ocean.

This crash occurred mere hours after Defense Secretary Leon Panetta visited Camp Lemonnier in Djibouti. Troops assigned to a unit in the horn of Africa are based here. This location is also home to a fleet of drones responsible for flying over the horn of Africa and in some regions of the Middle East.

The drone that went down in Iran on Dec. 4 still remains in Iranian custody and there are no plans for its return.

Despite the fact that President Obama requested its return, the Iranian government stated that it considers the drone's presence a hostile act and will not give it back. Iran's defense minister has even called on the U.S. to apologize for the incident.

Iran has displayed the drone on television and has said that it is close to cracking its technological secrets.

There has been no confirmation thus far as to what brought down the drone in Iran.