"I can't begin to know how her family is managing such a loss", she told Extra TV at a screening for her current HBO series Divorce.
Parker had also responded to a photograph posted by Cattrall of her brother. "So I'm writing to tell you one last time to stop exploiting our tragedy in order to restore your 'nice girl" persona".
The mystery was solved earlier this week when the Sex And The City actress was photographed as she left for her appearance on The Tonight Show in NY, showing off her new soft sweeping fringe and an updated golden blonde colour. Referring to his own product line, it looks like it was a range of volumising products that achieved Sarah Jessica's trademark tousled waves, which were styled to tumble effortlessly past her shoulders.
Hong Kong bus crash kills 18 and injures scores
Rescuers tried to reach passengers trapped in the wreckage although police were unable to say how many were still inside. In 2008, a speeding bus careered out of control at a Sai Kung roundabout, leaving 18 people dead and 44 injured.
When asked how she felt about Kim's comments during an appearance on U.S. show "What What Happens Live", she responded: "Just...heartbroken".
Days later she spoke about the message on Entertainment Tonight, stating: "If somebody in your life, whether you're in touch with them or not, [is] suffering for any reason, it's involuntary that you want to convey condolences or sadness or just let someone know you're thinking about them".
The online spat follows another Instagram post in which Cattrall thanked her "fans, friends and my #SexandtheCity colleagues for the outpouring of support" in the aftermath of her brother's death.
Last year, Kim was quoted as saying the Sex And The City cast were "never friends" and that Sarah "could have been nicer" after Kim turned down a third Sex And The City movie. Per the authorities, "no foul play [has been] suspected" in relation to Christopher's cause of death.