US comedian Kathy Griffin has been forced to "beg" for forgiveness after clutching what appeared to be Donald Trump's bloody, severed head.
After a barrage of criticism, the stand-up comedian and actress backtracked on Tuesday, saying she now knows she went "way too far".
Outrage over the photo shoot and a 12-second video clip came from the US president, his son, Donald Trump Jr, as well as Chelsea Clinton, the daughter of election opponent Hillary.
Griffin, 56, posted a video on Twitter in which she "sincerely apologised".
I am sorry. I went too far. I was wrong. pic.twitter.com/LBKvqf9xFB— Kathy Griffin (@kathygriffin) May 30, 2017
"I'm just now seeing the reaction of these images. I'm a comic, I crossed the line. I moved the line and then I crossed it. I went way too far," she said.
"The image is too disturbing.I understand how it affects people. It wasn't funny, I get it.
"I beg for your forgiveness."
She said she would ask photographer Tyler Shields to remove their collaboration from the web. He later deleted the video from YouTube.
President Trump tweeted today that the image had disturbed his children.
Kathy Griffin should be ashamed of herself. My children, especially my 11 year old son, Barron, are having a hard time with this. Sick!— Donald J. Trump (@realDonaldTrump) May 31, 2017
He said: "Kathy Griffin should be ashamed of herself.
"My children, especially my 11 year old son, Barron, are having a hard time with this. Sick!"
Ms Clinton had said: "This is vile and wrong. It is never funny to joke about killing a president."
The junior Trump tweeted: "Disgusting but not surprising. This is the left today. They consider this acceptable.
"Imagine a conservative did this to Obama as POTUS (President Of The United States)?"
The US Secret Service, which protects current a former leaders, tweeted that it monitored social media to "evaluate threats".
It added: "Threats made against @SecretService protectees receive the highest priority of all of our investigations."
Ahead of the controversy, Griffin joked with Shields in a video that they would have to move to Mexico to avoid federal prison.
In since deleted tweets, she said: "I do not condone ANY violence by my fans or others to anyone, ever! I'm merely mocking the Mocker in Chief."
Griffin said the image was a reference to Mr Trump's comments about former Fox News anchor Megyn Kelly.
In the run-up to the election, Mr Trump was roundly criticised for saying that the journalist had "blood coming out of her eyes, blood coming out of her wherever".