The planned trial of Philippine Vice President Sara Duterte is in doubt after the articles of impeachment were unexpectedly sent by senators back to the House of Representatives, whose prosecutors said they can’t — for now — comply with the request.

Philippine senators have set themselves as an impeachment court for the trial of Vice President Sara Duterte over corruption and other criminal allegations but they voted to send the raft of complaints back to the House of Representatives due to legal questions.

Senate President Francis "Chiz" Escudero, who sits as presiding officer of the impeachment court, said Thursday the Senate has yet to receive any pleading from the House of Representatives regarding the impeachment of Vice President Sara Duterte.