WARSAW, Poland (AP) — The foreign ministers of Poland and Britain have called for more economic sanctions on Russia, saying it is responsible for the downing of the Malaysia Airlines passenger jet over eastern Ukraine this month.

Poland’s Radek Sikorski said the responsibility for the downing of the airliner carrying almost 300 people rests with “the Russian Federation, who were and unfortunately are still supplying advanced weapons to the so-called separatists.”