Piles of skeletons and decayed body parts were shockingly discovered inside the storage room of an Indian police station on Thursday.

Workers at the police station in Unnao, in Uttar Pradesh, reportedly uncovered multiple sacks containing rotten human skeletons while cleaning a locked and disused room in the building, UK MailOnline reported. Regional authorities have promised to start an investigation, with DNA testing.

Although station officers initially failed to explain where the human remains had come from, they later said that the skeletons, which were gathered over a decade, had been used in criminal investigations while the room had been used as a mortuary until 2008.

However it remains unclear as to why the rotten human skeletons had never been disposed of.

The records indicated that there were roughly 100 bodies kept at the police building for investigation, Unnao police chief Mahendra Pal Singh told the Times of India. The remains were never cremated after post-mortem examinations took place, with officers having forgotten about the room.

A "proper probe and DNA testing would be done to corroborate the facts," he said. "We will also look into the case thoroughly to ascertain as to why the human remains were not disposed of."

The case appears to have breached procedures laid down for the disposal of bodies after post-mortem examinations, analysts said.

Meanwhile, the authorities in Unnao district are still investigating the disturbing discovery of more than 100 corpses, most of them children, washing up in a shallow tributary of the River Ganges, a sacred river where millions of Hindus cremate their dead, earlier this month.

Some have theorized that the dead bodies had been dumped by poor families who could not afford to pay for a proper cremation, BBC News reported.

In India, bodies are traditionally cremated usually within a day of the death since Hindu concepts believe in the detachment of the soul from the body at the time of death.

It is also an Indian custom not to cremate unwed girls.