Rob Kardashian has claimed that he got his ex-girlfriend Rita Ora pregnant while they were together.

The brother of Kim Kardashian launched an angry attack against Rita on his Twitter page this week after it was announced they have split. Yesterday he claimed that Rita cheated on him with numerous other men, and this morning Rob tweeted a message to Rita's official account in which he made further shocking allegations.

"So you let me get you pregnant and you let others hit raw?" Rob fumed.

The post has since been deleted from Rob’s page.

The latest claims from the 25-year-old sock designer come after he said he was "disgusted" with the How We Do singer, and blamed their relationship demise on her promiscuous ways.

"She cheated on me with nearly 20 dudes while we were together... But I mean 20?!!!! (sic)" he tweeted in the early hours of Monday morning.

Minutes later Rob continued to slam the singer. "How can a woman who is so busy trying to start her own career have time to be with so many dudes while in a relationship? I am actually disgusted," he tweeted.

These messages were also later deleted.

While Rita has yet to comment officially on the posts from Rob she does discuss their split in an upcoming interview with British Glamour magazine.

"I'm not going out with Rob. We were close for a while, but it didn't work because I was never there," Rita opened up to the publication.

"I was like a ghost. I used to get so frustrated with myself and then wonder why I was angry, so I decided it was best to keep it friendly - especially at the moment, when there's so much going on."

Rita continued to explain how she never loved Rob, blaming their busy schedules on the breakdown of their relationship.

"In 22 years, there's been nothing. I have had young fascinations but never love. I think it's my only weakness. I'm scared of letting my guard down, and if I feel in love with someone now, he'd have to try ten times harder to break it down," Rita confessed.

"I only need three things from a guy - for him to make me laugh, tell me I'm beautiful once in a while, and be there for me."

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