Men walk near a cordoned area in the lions' enclosure at a safari park in Lahore on Wednesday. Reuters

The staff of a safari park in Pakistan on Wednesday were shocked to find the remains of a teenager inside the lions' enclosure.

According to Chaudhry Shafqat, the deputy director general of Lahore Safari Park, the skull and bones of 18-year-old Muhammad Bilal were discovered when staff went to feed the animals.

Hearing the news the angry family of Bilal ransacked parts of the attraction to protest at what they said was incompetence by park authorities.

They also blocked a main highway and demanded the government initiate criminal proceedings against the park's management

Bilal has been missing for the last two days.

Members of Bilal's family declined to speak to media  as they were too upset.

Shafqat  wondered as to how Bilal managed to reach the lions' enclosure as the park had "more than enough safety measures in place."

He questioned whether Bilal had been killed before his body ended up in the enclosure.

"We are still wondering how he crossed the protective fence which is quite high and entered the lions' field," he said, adding the young man had been missing for the past two days.

"I think the police will also investigate whether the man himself climbed the fence and went inside or someone threw his dead body inside for the lions to eat."

He said Bilal's family told him and the police he had gone to the park to see one of his uncles who worked there.

Police official Najeeb Awan said they were investigating the incident.

Agencies