A 5.8-magnitude earthquake shook central Mexico early Sunday, sparking panic in the capital and some power cuts but no major damage or casualties were reported.

The quake struck just after midnight (0519 GMT), east of the city of Huitzuco in Guerrero state, at a depth of about 30 miles (50 kilometers), according to Mexico's National Seismological Service and the US Geological Survey.

The officials downgraded the magnitude of the quake from 6.0 reported initially.

Although the quake was felt strongly in the capital, "in the preliminary report, Mexico City was not damaged," Mayor Miguel Angel Mancera wrote on his Twitter feed.

Civil Protection chief Fausto Lugo told reporters: "We have no reports of major incidents. We reviewed the city and have no incidents."

But power was out in some areas of Mexico City, a local radio station reported, and the strong tremors sparked panic in some restaurants and bars, as customers hastily evacuated.

The international airport said on its social network account that there was "no damage to our airport infrastructure after completing the review that we make as part of earthquake security protocols."

In the coastal resort city of Acapulco, an AFP reporter saw some tourists leave their hotels but said there were no reports of damage.

In the southern state of Oaxaca, there were also no injuries or damage, except "some people with panic attacks, who did not need to be hospitalized," the local Red Cross said.

An 8.1-magnitude earthquake in September 1985 destroyed part of Mexico City and killed 3,700 people, according to official figures. Civil groups put the death toll from the quake at around 20,000 people.