UPDATE: Exit pollster GFK is also calling it a "technical dead heat" between PPK and Mendoza with a slight advantage to PPK.
UPDATE 2: The less reactive end of the Peru political commentariat tell your humble scribe that Veronika Mendoza has a strong chance of making it to round two on the back of this exit poll result, as the rural votes that don't make it into this snapshot should favour her. We shall see, but I'd say that even the 9pm "first official" number, which gives us between 20% and 30% of the totals, isn't going to give us a clear second place number. We're going to have to wait until tomorrow Monday for a result on this one. Gonna be tight, folks.