The find was made on the site of Armatambo, a pre-Columbian Indian city dating between 1100 and 1400 A.D., archaeologist Daniel Guerrero told The Associated Press on Wednesday.

It brings to 220 the number of mummies found at the excavations under the shantytown of Virgen del Morro since the dig began in 1992, said Guerrero.

Guerrero's team of 10 archaeologists has found the remains of four women, four children and four dogs sacrificed in the ancient city.

"We have discovered much information about the architecture and the function of the city itself," Guerrero said.

Guerrero said there are about 30 archaeological sites across Lima, a sprawling Pacific coastal town of almost 8 million people.

The Incas ruled Peru from the 1430s until the arrival of the Spaniards in 1532, constructing stone-block cities and roads and developing a highly organized and militarized society.