91 Students Remain Trapped in Rubble After Boarding School Collapse

At least 91 students remain trapped in the rubble two days after the collapse of the Al Khoziny boarding school in Sidoarjo, Indonesia.

The National Agency for Disaster Management (BNPB) confirmed the numbers and gave details of the rescue efforts in a statement on Instagram on Wednesday, Oct. 1, translated from the original Indonesian.

“Arriving at the site, the Head of BNPB with the Head of Basarnas [the National Search and Rescue Agency of Indonesia], the Orphan Province Secretary, and Governor Khofifah closely looked at the efforts….that continues to struggle to break through the ruins of a four-story building,” the BNPB said. “A big challenge is faced, because there are still 91 students suspected of being hoarded. Every second counts.”

The Al Khoziny boarding school collapsed as construction work was taking place at the site on Monday, Sept. 29, the BBC and Reuters reported. A police spokesperson told Sky News that building works were “unauthorized.”

Three people died in the incident, including a 13-year-old boy, and 38 people were left trapped inside the ruins, according to initial reports. Many of those trapped were students, believed to be boys aged between 12 and 17, per Sky News. 

As of Wednesday, Oct 1, rescue teams have located at least six children alive in the rubble, CNN reported. The teams made “tunnel-like passages or culverts to save the survivors,” Laksita Rini, Head of Fire and Rescue Department in Surabaya, told the outlet.

The BNPB is providing full emergency support in the search and rescue operation. The organization is being assisted by the National Search and Rescue Agency (Basarnas), Indonesian National Armed Forces (TNI), local police and volunteers to locate those missing, their statement noted.

A total of 102 people were evacuated from the collapsed building on Monday, Indonesia’s national newspaper Kompas initially reported. Around 100 people were injured in the collapse, with NBC News reporting head injuries and broken bones.

The foundations of the two-storey building were too weak to withstand the construction of the planned two additional floors, the BBC previously reported.

Never miss a story — sign up for PEOPLE’s free daily newsletter to stay up-to-date on the best of what PEOPLE has to offer​​, from celebrity news to compelling human interest stories.

Search and rescue teams are working on 15 locations at the school site and they believe six of those conatin survivors, NBC News reported, citing he head of Basarnas, Air Vice Marshal Mohammad Syafii.

The President of Indonesia, Prabowo Subianto, shared his prayers and condolences to the victims’ families, the BNPB added in their Instagram post.

PEOPLE has contacted Basarnas for comment, but did not immediately receive a response.