moscow russian defence ministry thursday deny allegations russian syrian jet kill least 150 civilians week bomb say careful hit civilians ministry respond comment make wednesday opposition rescue workers accuse moscow damascus kill least 150 civilians injure dozens air strike idlib province major-general igor konashenkov say statement opposition-run civil defence group make allegations make charlatans could regard objective source reliable information russian air force plan strike residential district populate areas order avoid casualties konashenkov say target terrorist base armor vehicles ammunition stories always identify drone always confirm channel beforehand say russian plan operate idlib province target militant fighters equipment last week russia deny syrian opposition allegation civilian deaths