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The death toll from a nightclub fire in the Russian city of Perm has risen to 109. Police have arrested five people in connection with the blaze. President Dmitry Medvedev has demanded tough punishment.

This is the moment, when a fireworks show ignited the ceiling of the club early Saturday.

The fast-spreading flames caused panic.

More than 200 people rushed for the club's one and only door.

But many crushed each other to death, and the others were choked by toxic fumes.

Svetlana Kuvshinova, Survivor, said, "Everything was catching fire so quickly, as if it was made of hay. We ran towards the only door and couldn't get out as everybody was pushing from all sides."

About 130 people were injured and those in a critical condition have been sent to Moscow or St Petersburg for treatment.

President Dmitry Medvedev has ordered a national day of mourning for Monday, with the national flags to be at half-mast across the nation. The media will also refrain from screening entertainment shows.

Medvedev has also demanded tough punishment for those responsible.

Dmitry Medvede, Russian President, said, "First, it seems to me they have neither brains nor conscience and secondly, they are completely indifferent to what happened. They should be punished according to the fullest extend of the law."

Five employees, including the club's owner and founders, have been detained.

Serget Sarapultsev, Prosecutor General's Office, said, "We have determined the group of people related to this tragedy, five of them are under detention. We are now investigating and considering the next measures to take against them."

Authorities have ruled out the possibility of it being a terrorist act. They have also played down any links with the deadly train attack last week.