The
call,
issued
by
the
UN
Security
Council
on
Thursday,
comes
after
South
Sudan
forces
stormed
the
strategic
oil
town
of
Heglig
on
Tuesday,
seizing
oilfields
and
reportedly
shutting
in
production.
Fears
have
escalated
this
week
of
an
all-out
war
between
the
neighbours
which
have
largely
been
at
loggerheads
since
South
Sudan
gained
independence
from
Sudan
in
July
last
year.
Both
have
been
unable
to
reach
an
agreement
on
oil
revenue
sharing
with
the
South
taking
with
it
about
three
quarters
of
the
enlarged
territory’s
total
oil
reserves.
South
Sudan’s
President
Salva
Kiir
on
Thursday
told
parliament
that
there
would…