MEXICO CITY (Reuters/AFP): Power outages hit the Mexican capital of Mexico City on Sunday after an earthquake struck the centre of the country, and officials said there was no other damage reported.

Some restaurants and residential buildings in the capital were evacuated as a precautionary measure, they said. Buildings shuddered in the city, a Reuters witness said.

The US Geological Survey (USGS) downgraded its initial measurement of the quake to magnitude 5.8 from 6.0. No one at state oil company Pemex was immediately available to comment but the group has no major installations near the epicentre of the quake, 14 miles (22 km) west of Jolalpan in southwest Mexico, 76 miles (122 km) south of Mexico City.

Meanwhile, a 6.5-magnitude earthquake jolted several towns along Nicaragua's Pacific coast Saturday, rattling buildings but causing only minor damage.

The earthquake struck at 11:34 am (1734 GMT), 90 kilometers (56 miles) west of the capital Managua in the Pacific at a depth of 36 kilometers, the US Geological Survey said.

Nicaragua said it was followed by about 10 aftershocks measuring between 3.6 and 5.3 in magnitude.

An 81-year-old man was the only reported casualty. He died of cardiac arrest, apparently succumbing to the temblor that lasted several seconds, according to the president of the national disaster response agency, SINAPRED, Guillermo Gonzalez. He said some buildings suffered cracks, including the offices of the Ministry of Development, Industry and Trade.

Seismologist Angelica Munoz said the quake was powerful and felt almost throughout the country, and there could be more aftershocks.

In the city of Leon, 90 kilometers northwest of Managua, the dome of a church was damaged. People said objects fell to the ground in the capital. Cell phone service and Internet access were knocked out for a few minutes.

At least six houses suffered cracks on their walls after the first tremor, according to the authorities.

The US Pacific Tsunami Warning Center said there was no threat of a destructive widespread tsunami, but there could be smaller localized ones.

A 6.2-magnitude earthquake in Managua in December 1972 killed 5,000 people and left more than a quarter million homeless.