BEIJING (AP) - China's Defense Ministry has put out a map of an East China Sea Air Defense Identification Zone that includes a chain of disputed islands also claimed by Japan.
Beijing has also issued a set of rules for the zone, saying all aircraft must notify Chinese authorities and are subject to emergency military measures if they do not identify themselves or obey orders from Beijing.
The rules went into effect Saturday.
The move has triggered a protest from Tokyo.
A Japanese Foreign Ministry official calls the zone "totally unacceptable."
And U.S. officials say they're "deeply concerned" about China's "unilateral action."
Secretary of State John Kerry says it "will only increase tensions in the region and create risks of an incident."
And Secretary of Defense Chuck Hagel says China's announcement "will not in any way change how the United States conducts military operations in the region."