Nico Rosberg is under investigation by the stewards in relation to his trip up the Mirabeau escape road on his final qualifying run in Monaco.
The implication is obviously that the FIA suspects that he might have deliberately triggered a yellow flag to protect his pole, as happened in the infamous Michael Schumacher ‘Rascassegate’ case in 2006.
The key issue is that Rosberg reversed out, knowing that Hamilton was coming, and that he had nothing to gain by so doing as his session was effectively over.
“Definitely, of course I’m sorry for Lewis,” he said. “I didn’t know exactly where he was but once I was reversing I did see he was coming up. Of course that’s not great, but that’s the way it is.”
It could be a long afternoon…
Adam Cooper's F1 Blog 
The reversing was definitely a deliberate attempt to ruin Lewis’s time.
& on replaying the incident, i’m not convinced Nico was caught out.