More than 30 people were injured when a deck collapsed at a Montana country club during a weekend golf tournament, police and city officials said Sunday.

The second-story patio floor of Billings' Briarwood Country Club broke and gave way Saturday evening. The collapse caused head wounds, broken ribs and other injuries as people landed atop each other and debris and scraps of food scattered over the grass next to the club's golf course.

Victoria Hill, a spokeswoman for the city of Billings, said the collapse occurred during a popular local golf tournament for which about 250 participants were registered.

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The police statement said there were no fatalities, although "multiple individuals" had injuries. The cause of the collapse has yet to be determined.

At least 25 people were taken to local hospitals, eight were treated on site and additional guests may have left injured, Billings Police Lt. Matt Lennick said in the statement.

Mark Zagel, a Briarwood patron who fell through the deck, wrote on Facebook that there were between 30 and 40 people on the patio when a section collapsed about 12 or 13 feet, without anyone directly below.

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"I am fine though the ribs on my right side are pretty bruised and have a couple of other minor bumps. Nothing broken, no head injuries ... There were multiple other more significant injuries — mostly broken bones," he said. "I landed on someone directly and had to be helped off her."

Zagel did not immediately respond to messages from The Associated Press.

At least 29 people were admitted to St. Vincent Healthcare's Emergency Department, and three people remained hospitalized as of Sunday afternoon, spokeswoman Angela Babcock said in a statement on Sunday.

Dr. Clint Seger, the CEO of the Billings Clinic, said in a statement that the hospital initially received six patients, with others expected.

"We have multiple trauma surgeons, ER physicians and the ER team along with critical care staff on site receiving patients," Seger said.

The Briarwood is a nearly 40-year-old country club in an upscale part of Billings that offers golf, dining and swimming.

A suspected gas explosion rocked South Africa’s largest city on Wednesday, leaving at least 1 person dead and dozens injured.

Authorities in Johannesburg are investigating the cause of an explosion that resulted in the death of a man whose body was found by firefighters underneath a vehicle. 

In addition to the man’s death, at least 48 people are said to have been injured.

The cause of the blast during evening rush hour Wednesday in downtown Johannesburg remains unclear. The company that supplies gas to that part of the city said it did not believe its underground pipelines were responsible, as authorities first thought.

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An investigation is underway as city authorities brought in specialists to determine what other underground pipes or cables there were in the area and to determine if there was a threat of another explosion or gas leak.

"We are still searching for the source," said Panyaza Lesufi, the premier of the Gauteng province, where Johannesburg is located.

Authorities estimated that an area covering five city blocks was damaged and at least six roads were affected. At least 34 vehicles were damaged, with some of them flipped on their sides or lying on top of other vehicles. Others had tumbled into gaping crevices that appeared in the middle of roads as the damage resembled a scene from an apocalyptic movie.

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The explosion happened just before 5:45 p.m. Wednesday, Lesufi said, just as many people were gathering on the streets to catch a minibus taxi home, one of South Africa’s most common commuting methods. Most of the damaged vehicles were minibus taxis. Eyewitnesses said some people were sitting in the buses when the explosion threw them into the air.

One man, who did not give his name, told television station eNCA that he was in his car when he heard, "a big sound. The next thing, I was in the air and my car was overturning."

He said he was shaken but unhurt.

The blast comes just a few weeks after another explosion, on the eastern outskirts of Johannesburg, killed 17 people including three children ageS 1, 5 and 15. 

Authorities have blamed that explosion on a toxic gas leak allegedly related to an illegal gold processing operation.

The Associated Press contributed to this report.