A strong earthquake of magnitude 8 has struck in the Pacific off the southern coast of Mexico.
The United States Geological Survey said the epicentre was about 100km south-west of the town of Pijijiapan and at a depth of 35km.
A tsunami warning has been issued for Mexico, Guatemala, EL Salvador, Costa Rica, Nicaragua, Panama and Honduras.
The quake was felt in Mexico City, with buildings shaking and people running into the street. Some electricity cuts have been reported in the capital.
No tsunami warning has been issued for the US west coast.
Mexico is currently also being threatened on its eastern coast by Hurricane Katia.