The announcement came after two days of meetings the foreign ministers held with government officials, student protesters and human rights groups aimed at bringing about dialogue after weeks of unrest.
The diplomats didn't say where the "good faith witness" would come from, but Maduro has said he was open to international observers. He even floated a name: Cardinal Pietro Parolin, the Vatican secretary of state, who was the Holy See's ambassador to Venezuela until he was summoned to Rome late last year.
According to AP, diplomats were still working out the details of the talks. Both sides have said they doubt their counterparts are genuinely willing to negotiate in good faith.