Report: Deputy heard at least 150 shots fired in gun battle with Omar Mateen

FBI agents investigate the damaged rear wall of the Pulse Nightclub where Omar Mateen allegedly killed at least 50 people on June 12, 2016 in Orlando, Florida. The mass shooting killed at least 50 people and injured 53 others.

ORLANDO, Fla. — As many as 150 shots were fired in a gun battle between police and Pulse nightclub shooter Omar Mateen, a deputy estimated in newly released report.

The Orange County Sheriff's office released more documents about the night of June 12, which details deputies' response when Mateen opened fire inside the club, killing 49 people and injuring dozens.

The 20 new reports describe deputies' accounts of that night as the shots were being fired.

One report details how deputies told a clerk at a nearby 7-Eleven gas station to shut off the gas pumps when deputies feared a bomb was in the area.

One deputy stated that he, "observed countless bodies stacked on top of each other, from one end of the room to the other. The floor was covered in blood, and it was difficult to tell which mangled body part belonged to which victim."

Orange County deputies were there to assist Orlando police, which was the agency in charge during the attack.

The documents describe the split-second decisions deputies had to make as they assisted patrons out of the club and helped them get to a triage unit.

One deputy reported that he was moving so quickly, his battery for his body camera fell off and there was no time to fix it.

Another deputy documented that he heard approximately 150 rounds being fired as officers rescued hostages inside.

Outside, another deputy couldn't make it in the club "because of the several dozen people running out of the building."

Other deputies said they were helping victims at nearby Dunkin Donuts, Einstein Bagels and 7-Eleven, which was evacuated during the bomb threat.