New footage and pictures have emerged of over 100 child skeletons from a mass human sacrifice in northern Peru that is believed to date back some 1,000 years.

The excavations at the site in Trujillo have been ongoing for months but researchers on Thursday confirmed a total of 109 sets of child remains had been uncovered — making it the largest site in the world for child sacrifice remains.

Child sacrifice is thought to have been performed to please gods during tough times. ( Reuters: Douglas Juarez )

The remains of 200 llamas were also uncovered in the area.

"This doesn't have any parallels in any other place in Peru, nor in Latin America, nor in the world," archaeologist Gabriel Prieto said.

Some of the skeletons discovered near the Peruvian city of Trujillo. ( Gabriel Prieto/National Geographic via AP )

Various ancient civilisations such as the Salinar and Moche have occupied this site, but researchers believe the child sacrifices were performed by the Chimu culture from about 900 CE.

The remains are estimated to be at least 1,000 years old. ( Gabriel Prieto/National Geographic via AP )

"Here we have come across a site that is at least 1,000 years old, occupied since the Salinar culture of 400 CE to about the year 600 in the common era from the Moche [culture]," Mr Prieto said.

"Many years later the site was re-occupied as an area for child sacrifice from the Chimu culture."

Many of Peru's ancient cultures practised human sacrifice. The exact ideologies behind the practice are unknown but it is often thought to have been performed in order to placate gods during tough times.

Also unearthed in the country's north are pre-Incan frescoes from the Chan Chan archaeological park in La Libertad, Trujillo.

Believed to be about 700 years old, the frescoes feature depictions of marine life and the waves of the ocean, symbolic of the coastal region they lived in.

The frescoes also originate from the Chimu culture, which was wiped out by the Incan civilisation in 1470 CE.

Sorry, this video has expired Archaeologists in April unearthed what they suspected was the largest child sacrifice site in history

Reuters