Philippine President Ferdinand Marcos said on Monday he will not take lightly "troubling" threats against him, just days after his estranged vice president said she had asked someone to assassinate the president if she herself was killed.

Philippines Vice President Sara Duterte said Saturday if she is killed, she has contracted an assassin to assassinate President Ferdinand Marcos Jr., his wife and House of Representatives speaker.

Philippine Vice President Sara Duterte said on Saturday she would have President Ferdinand Marcos Jr assassinated if she herself were killed, prompting Marcos’ office to vow “immediate proper action.”