Lisa Vanderpump shared a tweet that said "fire them," in reference to the Real Housewives of Beverly Hills cast

Kyle Richards and Lisa Vanderpump‘s feud is continuing to heat up.

On Thursday, Vanderpump, 58, retweeted a message that said her Real Housewives of Beverly Hills castmates should be fired.

“New title for RHOBH after it falls apart without LVP: ‘Back Stabbing Bitches of Beverly Hills.’ @RHOBH_ #TeamLVP #RHOBH What a disgusting display from Kyle, Dorit, Teddi, Erica [sic], and Rinna #NoClass,” read the original tweet, before a second user retweeted that message and added, “Fire them.”

Credit: Lisa Vanderpump/Twitter

Richards, 50, then posted a screenshot of Vanderpump’s tweet to her Instagram Story, adding a red arrow pointing out the retweet and an image of a cartoon man smoking a pipe with the caption “Interesante.”

Bravo reps are not commenting on the social media posts.

Credit: Kyle Richards/Twitter

In early February, Richards revealed that she hadn’t spoken to Vanderpump or her husband Ken Todd since a blowup at their house while filming season 9. (The drama apparently began over a dog that Dorit Kemsley adopted from Vanderpump’s rescue center and then gave away.)

“The last time I spoke with Lisa or Ken was when I was at their house and we were going to have a talk, and then it ended up being a disaster,” she said on Watch What Happens Live with Andy Cohen. “When you’re kicked out of someone’s house… it was really strange for me because I’m so close with them.”

Kyle Richards; Lisa Vanderpump
| Credit: Rodin Eckenroth/WireImage; Robin Marchant/FilmMagic

Richards added that any attempts to contact Vanderpump have gone unanswered.

“I’ve sent a text and an email,” she said. “I don’t know if I’m blocked or supposedly blocked, but that’s the last time we spoke.”

Vanderpump recently revealed to PEOPLE that she almost left the reality show after the death of her brother, Mark Vanderpump, last April.

“I did talk to Bravo… and said it would probably be for the best for me if I didn’t come back to Housewives this year,” the reality star said. “I just had such a hard time in my personal life I probably wasn’t strong enough to do the show.”

Vanderpump and Richards have been close friends since RHOBH premiered in 2010. In recent interviews, Vanderpump has demurred when asked if she’s quitting the reality show but confirmed she opted out of shooting group scenes after a big blow-up.

“It’s my ninth season and I had a very difficult year and after doing Vanderpump Rules and opening a new business, things got very complicated. So I’m in most of the season, but it got a bit complicated,” she said on The Talk in November.

The Real Housewives of Beverly Hills airs Tuesdays at 9 p.m. ET on Bravo.