CBS has responded to Pauley Perrette‘s claim that she left NCIS after “multiple physical assaults.”

In a statement obtained by PEOPLE on Tuesday, CBS Television Studios confirmed that the actress came forward with a “workplace concern” over a year ago and that it “took the matter seriously.”

“Pauley Perrette had a terrific run on NCIS and we are all going to miss her,” CBS Television Studios said in the statement.

“Over a year ago, Pauley came to us with a workplace concern,” the statement continued. “We took the matter seriously and worked with her to find a resolution.”

The statement concluded: “We are committed to a safe work environment on all our shows.”

Days after her emotional May 8 finale, Perrette, who starred as Abby Sciuto for 15 seasons, spoke out about her recent departure from the CBS drama on Twitter.

“I refused to go low, that’s why I’ve never told publicly what happened. But there are tabloid articles out there that are telling total lies about me. If you believe them? Please leave me alone. You clearly don’t know me. (Sorry guys, had to be said),” Perrette, 49, tweeted Saturday.

A day later, Perrette posted three more tweets, in which she claimed a “machine” is “keeping me silent” and alleged that there were “multiple physical assaults.”

“Maybe I’m wrong for not ‘spilling the beans’ Telling the story, THE TRUTH. I feel I have to protect my crew, jobs and so many people. But at what cost? I.don’t know. Just know, I’m trying to…