The deliberation process on whether to impeach the vice-president has been thrown back to the Lower House for consideration.

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.

Philippine senators on Tuesday voted to send an impeachment case against Vice President Sara Duterte back to the lower house for clarification, just hours after convening a trial that could see her banned from politics for life.