g:  I won't speak to my father ever again unless I'm called to give evidence against him. 

In a statement Friday, Meghan addressed the report that her father was being investigated.

 The breadth of what has now been uncovered is more sickening than one could ever imagine,  said Meghan, whose relationship with her father has been limited and fraught in recent years. He did not attend her wedding to Prince Harry in 2018, drawing widespread media scrutiny.

She said the letter sent to the British police and other authorities in 2018  made troubling and disturbing allegations against my father and I was given assurances that these were being investigated. 

Meghan added that she had chosen to keep her children, Prince Archie, 7, and Princess Lilibet, 5, away from her father  for one reason: to protect them. 

Markle Sr., 82, denied the reported allegations, calling them  sick lies  in a statement to Britain's Daily Mail newspaper. He added they were  the worst thing anyone could accuse me of. 

His daughter, Samantha Markle, also dismissed her brother's allegations, telling the Daily Mail  there is no merit in these disgusting allegations whatsoever ... He wants to destroy our dad. Shame on him. 

NBC News did not immediately receive responses to requests for comment from Markle Jr. or Samantha Markle - Meghan's half-siblings.

NBC News was not immediately able to identify a contact for Markle Sr., who the Daily Mail reported was now in a Florida rehab center recovering from surgery.

In a statement, the FBI said it was  aware of the allegations and will provide support, as appropriate, to the Philippine authorities. We will also investigate any related allegations of federal violations of U.S. law. 

The Philippines' justice department confirmed Friday that  the matter is under investigation  but otherwise declined to  provide further details at this time. 

Meghan, 45, and Harry, 42, moved back to the United Kingdom earlier this summer after several years in the United States.

The couple made their first joint public appearance last week visiting charities in central England. King Charles III has made clear that their return does not signal a return to active royal life. Harry, however, has said recently that he wants his disagreements with his family to  work out.