Rescuers have pulled a small dog alive from the rubble of a collapsed building in Mexico City, six days after the country’s deadly quake.

Members of a Japanese search and rescue team cradled the white schnauzer dog and petted its head as they brought it down from the wreckage.

The rescue took place at an apartment building in a southern neighbourhood of Mexico City.

The building is one of a dwindling number of collapse sites where crews still have hopes of finding people alive.

As another aftershock jolted south-western Mexico on Sunday (local time), the death toll from Tuesday’s magnitude-7.1 earthquake climbed to 320 people.

With thousands of buildings damaged, survivors slept on the street outside their homes and estimates of the cost of the earthquake ran as high as $8 billion.

Many have been traumatised by the second major quake to strike Mexico City in their lifetime after a devastating 1985 tremor killed an estimated 10,000 people.

The dog was found five days after the 7.1 tremor rocked the city. Photo: Getty Images

On Monday (AEST) rescue workers found another body under the debris of the Enrique Rebsamen school which collapsed during the earthquake, bringing the death toll at the site to 26.

According to the Mexican Navy, the unidentified woman’s body was found on the second floor 130 hours after the tremor.

The latest victim brings the death toll from the Enrique Rebsamen school to 26 – 11 children and seven adults. Eleven children were rescued alive.

The Navy says the search and rescue operations for survivors will continue until it’s confirmed that no one, alive or dead, remains under the school’s rubble.

The death toll from the earthquake in Mexico has reached 320 – 182 deaths in Mexico City, 73 in Morelos, 45 in Puebla, 13 in the State of Mexico, six in Guerrero and one in Oaxaca.

– with agencies