World markets remained under pressure on Friday after the downing of a Malaysian airlines jet at the Ukraine-Russia border, new sanctions on Moscow and unrest in Gaza had sent investors scurrying into defensive assets. European shares (.FTEU3) saw more selling after falling heavily on Thursday, while German government bond yields World leaders demanded an international investigation into the shooting down of the Malaysian plane with 298 people on board over eastern Ukraine, as Kiev and Moscow blamed each other for a tragedy that stoked tensions between Russia and the West.