Looks like Kirstie Alley is none too happy with apparent former friend Leah Remini for leaving the Church of Scientology. 62-year-old Kirstie, a longtime member of the church, lashed out at an unnamed target via Twitter last Wednesday, writing:

    "When faced w malicious gossip I take a moment to experience the loss of a person I thought was my friend . . Then I say f**k em . . . : ) #Rise."

The always outspoken former Cheers star also got in another dig and added:

    "The sweetest poison is often served with a smile ... beware syrup."

Yikes! We wouldn't want to go to a dinner party at her house!

Could this tirade be about Leah, who announced her departure from the church last week, after Tony Ortega's blog on Scientology reported the high-profile break up? The former Veronica's Closet star has not named names but all signs point to yes. On Thursday, the day following Kirstie's angry tweets, the New York Post's Page Six reported that Leah had made a "dramatic exit" from the Church and had allegedly been put through years of "interrogations" and "thought modifications," after questioning the whereabouts of church leader David Miscavige's wife as well as having other criticisms about the church and its practices.

A rep for the church commented on the Page Six story, telling Us Weekly, "The Church respects the privacy of parishioners and has no comment about any individual Church member." If only Kirstie had taken the high road.

Alley has tried to back peddle a bit her internet assault. On Sunday, she Tweeted:

    "you're so vain..You probably think my tweets are about you ..don't you don't you don't you ? .....they're not."

On Monday, she added:

    "Don't believe everything you read fact don't believe anything you read..even better, just stop reading."

Seems like somebody needs some thought modifications!