Story highlights
- Sebastian Vettel wins Singapore Grand Prix
- Title leader Lewis Hamilton retires with technical fault
- Vettel and Nico Rosberg close up in title race
- Spectator on track causes safety car
(CNN)Even an intruder who risked life and limb by wandering on to the track during a Formula One race could not prevent Sebastian Vettel from racing to a pole to checkered flag victory in an incident-packed Singapore Grand Prix Sunday.
Germany's Vettel was first to spot the man and had the presence of mind to radio in to his team. "There is a fan on the track," he repeated twice.
It led to a second safety car at two thirds distance of the 61-lap race on the Marina Bay circuit.
F1 officials later said that a