A magnitude 7.6 earthquake has struck this morning near Acapulco in Mexico.
The United States Geological Survey said the quake struck 52km northest of Ometepec and 183km east of Acapulco at a depth of 10km.
It was initially measured as magnitude 7.9, but was later downgraded to 7.6, and was followed by a strong aftershock.
No tsunami alert was issued by the Pacific Tsunami Warning Centre.
The first quake was strongly felt in Mexico City, with buildings swaying - sending frightened workers and residents into the streets.