Embattled Hong Kong leader Carrie Lam said she has caused "unforgivable havoc" by igniting the political crisis engulfing the city and would quit if she had a choice, according to an audio recording of remarks she made last week to a group of businesspeople.

At the closed-door meeting, Lam told the group that she now has "very limited" room to resolve the crisis because the unrest has become a national security and sovereignty issue for China amid rising tensions with the United States.

"If I have a choice," she said, speaking in English, "the first thing is to quit, having made a deep apology."