The country's President, Enrique Peña Nieto, described the quake as the strongest in a century.

The earthquake struck about about 54 miles (87km) south-west of Pijijiapan.

Tsunami warning has been issued for Mexico, Honduras, Nicaragua, Panama, Guatemala, El Salvador and Costa Rica.

The quake was felt in the capital, Mexico City, where tremors were reported to have lasted up to a minute..

At least 20 deaths were reported in Mexico's Oaxaca state.

Four people were reported killed in Chiapas, while two children died in Tabasco state.

Power cuts were also reported, which lead to the death of an infant, who died after the respirator stopped working.

Guatemalan President confirmed the death of one person in the country.

The Pacific Tsunami Warning Center (PTWC) said that tsunami waves "reaching more than three metres above the tide level are possible along the coasts of Mexico".

Mexico is also facing threat from Hurricane Katia, which is expected to hit its eastern coast.

Image: @CRGuatemalteca/Twitter