CNR
said
four
workers
were
hurt
in
the
blast.
Three
were
taken
to
hospital
with
non-life
threatening
injuries,
including
burns.
All
four
are
said
to
be
in
a
stable
condition.
Fire
fighters
are
still
battling
the
blaze
at
the
plant,
north
of
Fort
McMurray,
Alberta.
The
fuel
source
of
the
fire
has
been
isolated
and
the
blaze
contained
to
the
coker
area,
with
no
site
evacuation
required.
The
Alberta
Energy
Resources
Conservation
Board,
Alberta
Environment,
and
Alberta
Occupational
Health
&
Safety
were
launch
an
investigation
into
the
incident
once
the
fire
has
been
fully…