Dominic Monaghan had some heated words for his former "Lost" co-star Matthew Fox on Twitter over the weekend. It all stemmed from a fan asking Monaghan to persuade Fox to tweet more.

"He beats women. No thanks," he told the fan, @omggbeccaa.

Monaghan was seemingly referring to an allegation by a female Cleveland party-bus driver who filed a personal-injury suit against Fox last year after he allegedly punched her in the groin when she refused to take him back to his hotel. Prosecutors never filed charges against the actor, and Fox has since countersued the woman for defamation.

After Monaghan's initial tweet to her, the fan responded, "I KNOW IT WAS WRONG BUT WHAT?! WHAT ABOUT ALL THOSE GOOD TIMES YOU HAD TOGETHER?!"

He tweeted back, "How do you know we ever did?you don't know either of us.he beats women.not isolated incidents.often.not interested."

Regarding the Cleveland woman's claim against Fox, the actor added, "An accusation is when you'claim' someone did something wrong.i know.but hey little fan girl maybe want to get slapped around by him? Daddy issues? Blinded by the nice haircut? It's never okay. Maybe you have lower standards."

As the heated conversation came to an end, the fan responded, "Sorry about the matthew fox thing stay awesome," before she began receiving threats from people who accused her of condoning abuse. "To clear things up- when i wrote that tweet i had no idea it would get that kind of a response from dom.. after that tweet, i wrote back without even thinking- in that moment i was just diassapointed- so for those of you who are saying that i think it is okay to 'beat women' you are wrong, so please stop with the hate tweets," she wrote. "i respect doms opinion, just not the way he handled the response."

According to TMZ, since the exchange went down over the weekend, a source close to Fox said he has never beaten a woman, despite Monaghan's Twitter allegations. The source added that the actors haven't spoken in years and never had any huge arguments that would lead to Monaghan's Twitter tirade. Fox's rep has yet to comment.

In 2010, Monaghan portrayed an abusive boyfriend in Eminem's "Love the Way You Lie" video alongside Megan Fox.

"I think we tried as hard as we could to not glorify the violence, to try and explain that this was a relationship that is by no means ideal and a relationship that probably should have ended a lot sooner than it did," Monaghan told MTV News in 2011 about his role in the controversial clip.

Of Em's own history with violence, Monaghan added, "He has a very good handle on his anger. He's able to channel it very easily. Instead of hiding behind it or pretending that there's something else going on, he actually is able to pinpoint where his anger is coming from."