the labour leader and his party 's spin machine prompted the most bitter row of the campaign so far by suggesting that david cameron bore personal responsibility for drownings of refugees in the mediterranean tragedy .
ed miliband claimed the mediterranean crisis was ` accusing the prime minister of murder ' in a ` desperate and negative ' attempt to score political points by exploiting a human tragedy .
the labour leader later insisted he was not saying mr cameron had ` blood on his hands ' , but was making a ` very important point about post-conflict planning in libya ' after the overthrow of colonel gaddafi .