At least 14 people, 10 of them children, were killed when a roof collapsed at a swimming pool in the Urals region of Russia, officials say.
Rescue workers found more bodies trapped beneath concrete slabs
As many as 11 others were injured in Sunday's accident in Chusovoi town, near the city of Perm.
Investigators are looking into what caused the concrete roof to give way.
A similar collapse at a water park in Moscow in February 2004 left 28 dead as swimmers were showered with shards from the giant glass roof.
Emergency ministry officials were quoted as saying four cranes and more than 300 rescuers had been sent to the scene of the accident.
Earlier, officials reported that nine swimmers had died.
The death toll rose to 14, of whom four were said to be women, after rescue workers found more bodies trapped beneath concrete slabs.
It was not clear why the 100 sq-m (1,100 sq-ft) roof collapsed, though recent heavy snowfalls were considered a possible explanation, according to some officials.
Local prosecutors have opened a criminal investigation into the incident.
Deputy regional prosecutor Alexander Belykh told Russian news agency Itar-Tass that investigators were concentrating on the possibility of a "technical reason" for the collapse.
He dismissed speculation it could have been the result of a terror attack.
Up to 30 people were in the pool at the time of the accident, officials said.
The injured included four children, two of whom were in a serious condition, said a crisis centre at the scene quoted by the Interfax news agency.
Eyewitnesses said they heard a noise and the roof started falling down, according to police sources.
Speaking from his hospital bed, Roman Guzenko told Russian television: "We were swimming leisurely close to each other.
"It collapsed in a fraction of a second. We didn't even understand what happened."
His wife also survived, with serious injuries, but the couple's four-year-old son was killed in the collapse.
The pool, known as the Dolphin, was built 11 years ago.
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