JUCHIT DE ZARAGOZA, Mexico - Sobbing families followed coffins through the streets and picked nervously at the ruins of their homes on Sunday as help trickled in after an earthquake killed 90 people.

"I don't know if I am crying from sadness, from shock, or from fear of what might happen next, and how we will live," said Refugio Portales, in the hard-hit town of Juchitan.

She followed the white coffin of a friend on the back of a truck to the shrill sound of pipes.

Mexican seismological authorities measured Thursday night's quake at magnitude-8.2, under the Pacific off the coast of Chiapas state.

That was bigger even than the 8.1 quake that killed 10,000 people in Mexico City in 1985.

People in Juchitan were afraid to return to their homes, fearing the effects of hundreds of aftershocks - but camped within sight of them to prevent looting.

Juana Luis, 40, spent the night with her family under a tree in the garden next to their house, which was reduced to a pile of concrete rubble, twisted metal and electrical cables.

"It is very sad to live like this, on hammocks hung in the garden, under the rain, with our belongings buried in the house," she said.

Luis secured some emergency food handouts, but food prices have soared in the disaster zone.

"We used to get a chicken for 70 pesos ($4) and now it costs 300. That makes me really anxious, because however much I want to buy something for my children when they ask me, I can't afford to," she said in tears.

As soldiers and mechanical diggers worked to clear the ruins of the town hall, some picked cautiously through the rubble to salvage household items.

"We are afraid to go inside our houses to remove the rubble, but we have no other choice because no one is coming to help us," said Carlos Villalobos Martinez, a retired man of 58.

He said he escaped "by a miracle" with his wife and three children when their house collapsed.

On the square near the town's Martes Santo church, a group of women camped in the rain, cooked eggs on a fire and prepared corn tortillas.

"We still have no water or electricity. We are sleeping with the children out here in the open," said one of them, Maria de los Angeles Orozco.

"No one has come to help us."

Ivan Rodriguez, 40, echoed that sentiment, saying "we've received very little help".

AFP - AP