NEW YORK (AFP) - After years of reported behind-the-scenes friction, tensions between two Sex And The City stars erupted into public view on Saturday (Feb 10).

The star of the popular HBO series, Sarah Jessica Parker, had long been known to have a difficult relationship with one of her three co-stars, Kim Cattrall.

There were reports, regularly denied by Cattrall, that she was the one holding up plans for a possible second sequel to the movie version of Sex And The City.

Early on Saturday, Cattrall posted on Instagram: "I don't need your love or support at this tragic time @sarahjessicaparker. My mum asked me today, 'When will that @sarahjessicaparker, that hypocrite, leave you alone?' Your continuous reaching out is a painful reminder of how cruel you really were then and now."

Cattrall appeared to be reacting to a social media post from Parker in which she expressed her "love and condolences" to Cattrall over the death of her brother last week.

Cattrall's Instagram post continued: "You are not my friend. So I'm writing to tell you one last time to stop exploiting our tragedy in order to restore your 'nice girl' persona."