Russian rescue workers are continuing to sift through the wreckage of a roof collapse that killed at least 25 people at a Moscow water park late Saturday.

Moscow Mayor Yuri Luzhkov, who visited the scene of the disaster Monday, says there is no hope of finding any more survivors. But he says he believes nine to 13 bodies remain buried in the rubble.

Dozens of victims remain hospitalized, many with broken bones, concussions and bruises.

The Transvaal water park was packed to capacity late Saturday when the glass dome came crashing down on hundreds of bathers.

Authorities have ruled out terrorism, saying a heavy accumulation of snow on top of shoddy construction probably caused the collapse. Prosecutors have opened a criminal investigation into the construction company that built the dome.

The disaster came a week after an apparent terrorist bombing tore through a crowded Moscow subway car, killing 41 people. President Vladimir Putin blamed the blast on Chechen rebels.

Some information for this report provided by AFP and AP.