Tarek El Moussa and Christina El Moussa
"Flip or Flop" stars Tarke El Moussa and Christina El Moussa are seen in this photo dated Dec. 13, 2014. Getty Images

Rumors about "Flip or Flop" star Tarek El Moussa's behavior continue to do the rounds, as a new report claimed the reality TV star made some nasty comments about Gary Anderson, the contractor who dated his estranged wife Christina El Moussa. According to In Touch Weekly, Tarek slammed Christina's ex-boyfriend on Instagram earlier this month.

“Thank God those heart attacks didn’t kill him — he may make 60,” Tarek commented on a photo shared by Gary's daughter Kacey Ander­son.

A source told In Touch Weekly that Gary "would never confront Tarek. He doesn’t care about him,” adding: “Tarek’s had [testicular and thyroid] cancer, so he should know better than to write that about another man’s health... But this is Tarek’s way of getting the last word.”

In recent interviews, Tarek expressed his disapproval of Gary and also said that it was difficult for him to accept the latter's relationship with his estranged wife. However, he stressed that he has moved on and is in a better place, insofar as Christina is concerned, as the two continue to work together on the HGTV show.

Meanwhile, in another report, In Touch Weekly claimed — citing another source — that Tarek has been exhibiting bizarre behavior on social media.

“He’s a bully who doesn’t care about hurting anyone’s feelings,” the HGTV network's source said. “It’s a classic Tarek move to say absurdly rude things. He doesn’t think before he speaks.”

This is not the first time rumors surfaced about Tarek's troubling behavior. Earlier this year, reports surfaced that Tarek had a habit of being “verbally abusive” to Christina.

“Tarek treated Christina like garbage,” a source told In Touch Weekly. “When she said the wrong thing and they had to do a retake, he got pissed. He often made her cry. Tarek found humor in humiliating his wife in repeated verbal attacks. Some of his bad behavior was even caught on camera [in footage that never aired]."