MOSCOW : The death toll from last weekend's Russian nightclub fire has risen to 121, officials in the region of Perm said Wednesday.

The regional administration of the Urals Mountain city posted the figure on its Web site.

The blaze at the Lame Horse nightclub broke out early Saturday when an indoor fireworks display ignited the plastic ceiling, which was decorated with branches. The blaze spread swiftly while hundreds of customers tried to flee through a single exit.

Many of the 111 people still hospitalized are in critical condition.

Four people, including the club owner and a pyrotechnics supplier, have been jailed pending an investigation into negligence causing death, and several regional fire safety officials have been fired.

A fifth suspect, the club's tenant, died in a Moscow clinic Wednesday from injuries sustained in the fire, Russian agencies said.