The actor hands over his twin boys after a judge temporarily strips him of custody

Charlie Sheen got a reality check Tuesday evening when police officers visited his Beverly Hills mansion to take his twin boys out of his custody, a source confirms to PEOPLE.

The move comes after his ex Brooke Mueller won a restraining order in Los Angeles Superior Court earlier in the day based on recent allegations that Sheen was physically and verbally abusive to Mueller, according to her legal declaration.

Get push notifications with news, features and more.

“I am very concerned that [Sheen] is currently insane,” Mueller stated in the document. “I am in great fear that he will find me and attack me and I am in great fear for the children’s safety while in his care.”

Judge Hank M. Goldberg stripped Sheen of custody of his boys – for now – and forbade him from communicating with Mueller or getting within 100 yards of her or the kids.

Mueller alleges that Sheen took their twins, Bob and Max, 23 months, from her residence without her permission on Feb. 26 and had withheld them from her since then, according to the court documents.

Sheen “rarely saw our children [since our Dec. 25 domestic incident] and only recently began to show any interest in them,” Mueller stated.

When she tried to get the twins back, Sheen allegedly threatened, “I will cut your head off, put it in a box and send it to your mom,” she said.

Mueller also alleged that while on vacation in the Bahamas last week with his two girlfriends, Sheen launched into a tirade against Mueller, punched her in the arm, spat on her feet and “threatened to stab my eye with a pen knife,” the documents show.

A hearing is set for March 22 to determine whether to extend the restraining order. Both Sheen and Mueller are required to attend.

When contacted by PEOPLE and asked if he planned to fight for custody of his sons, Sheen replied with a text message that reads, “Born ready. Winning.”

• With additional reporting by ELIZABETH LEONARD

For much more on Charlie Sheen, including the childhood influence of his father’s Vietnam war epic Apocalypse Now, his thoughts on his exes and his prediction about the future of Two and a Half Men, pick up this week’s issue of PEOPLE, on newsstands Friday