Backstreet boy Nick Carter received a temporary restraining order against younger brother Aaron after allegedly threatening to kill Nick's pregnant wife.
The singer, 39, said the legal move was "against the backdrop of Aaron's increasingly worrying behavior."
In response, Aaron Carter said he was "amazed" by the allegations.  "I do not wish to harm anyone, especially my family," he continued.
"After careful consideration, my sister Angel and we regret having to seek a restraining order against our brother Aaron," Nick Carter said Tuesday.
Aaron's anxious behavior and his recent confession that he was caring for the thoughts and intentions of killing my pregnant wife and unborn child were no choice but to take every possible measure of
"We love our brother and we really do. hope he gets the proper treatment he needs before any time to cause to yourself or someone else, "continued Carter.
Aaron, who became known in the late 1990s as a child singer, acknowledged the restraining order on social media, but denied allegations of threatening behavior.
"Take care of Nick Carter. We're ready for life."
In a recent episode of the American television show "Doctors," Aaron stated that he suffered from multiple personality disorders, schizophrenia, acute anxiety and manic depression.
He later said he had no mental health issues and said the show was edited to make it look like it was doing what the show's producers denied.
Nick Carter, whose band had hits with songs such as "All of Me," claim it this way, announced in May that he and his wife, Lauren, were expecting their second child.
Last year it was decided that Carter's older brother would not be charged with sexual assault since 2003.
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