Moscow ? Grieving relatives on Sunday begin to bury the victims of a nightclub fire that left at least 112 people dead, as four people were ordered held pending an investigation into the country’s worst blaze in decades.

About 130 people remained hospitalized with injuries from the early Saturday blaze, which witnesses said was sparked by onstage fireworks that shot into the decorative twig ceiling of the Lame Horse club in the industrial city of Perm.

The federal Investigative Committee said the suspects — the club’s owner, the executive director, the artistic director and a businessman hired to install pyrotechnics on the night of the blaze — were ordered taken into custody Sunday by Leninsky District Court.

The committee’s Web site said they were suspected of negligence causing multiple deaths and violating fire safety rules causing multiple deaths.

Mourning residents of the Ural Mountain city of over 1 million were indignant over the alleged negligence in a country where enforcement of fire safety standards is infamously poor and there have been several catastrophic blazes at drug-treatment facilities, nursing homes, apartment buildings and nightclubs in recent years.