MANILA (Reuters) - Philippine Vice President Sara Duterte failed to appear on Wednesday for questioning over a purported threat to assassinate President Ferdinand Marcos Jr, choosing instead to send a letter denying an allegation she made a "grave threat" to his life.

Philippine Vice-President Sara Duterte partied with journalists Wednesday as she thumbed her nose at an official inquiry into allegations she plotted to assassinate President Ferdinand Marcos, her estranged ally.

The Philippines’ National Bureau of Investigation will proceed with probing Vice President Sara Duterte’s apparent assassination threat against President Ferdinand Marcos Jr. after she failed to appear for questioning for a second time on Wednesday.

Philippine President Ferdinand Marcos Jr said on Friday that any impeachment complaint against his estranged vice president Sara Duterte would only distract Congress and not help people, in remarks that drew criticism from some lawmakers.

Philippine Vice President Sara Duterte expressed doubts on Wednesday on getting enough support among legislators to fight impeachment complaints filed against her, saying the process is a “political activity.

A second impeachment complaint was filed against Philippines Vice President Sara Duterte, the latest development in a brewing political crisis stemming from her public row with President Ferdinand Marcos Jr.

The Philippine vice-president insisted her remarks were taken out of context and said she did not trust authorities.