Ed Miliband said David Cameron "should be ashamed" of the Conservative party's election campaign after a Tory minister accused Miliband of "stabbing his brother in the back".
Defence secretary Michael Fallon sparked a furore online today after The Times published article by him in which he said Miliband had a "lust for power".
He added: "Ed Miliband stabbed his own brother in the back to become Labour leader. Now he is willing to stab the United Kingdom in the back to become prime minister."
Miliband retorted by saying that British people "want better politics than is being served up by the Conservative party in this campaign".
Miliband was responding to questions from the media at an event in central London to launch Labour's education manifesto.
The Labour leader went on to say that the prime minister "should be ashamed" and accused him of running a negative campaign.
"He's got nothing positive to say about the future of this country," Miliband said. "He's got no positive vision for the country. And he sends out his minions, like Michael Fallon, to engage in desperate smears."
Siraj Datoo is a political reporter for BuzzFeed News and is based in London.
Contact Siraj Datoo at email@example.com.
Got a confidential tip? Submit it here.