Philippine authorities handed a subpoena to Vice President Sara Duterte’s office, inviting her to answer investigators’ questions after she publicly threatened to have the president assassinated if she were killed in an unspecified plot herself.

Philippine President Ferdinand Marcos vowed on Monday to fight back against what he called reckless and troubling threats against him, speaking out after his estranged vice president said he would be assassinated if she herself were killed.

MANILA (Reuters) - Philippine law officials on Tuesday summoned vice president Sara Duterte for questioning over her weekend statements that she had contracted someone to assassinate President Ferdinand Marcos Jr. if she were to be killed.