Your guess was indeed correct, as explained on Sky Sports News and the ref has apologised.I'm guessing a Newcastle player encroached on the area and the referee doesn't understand the rules.
Could have been very costly to Newcastle.
Can't believe now all four officials are miked up he wasn't advised of the mistake.
But you would have thought that at least one of them would have shouted up on this surely? The whole crowd (home and away) knew the rules but the men in the middle didn't?Hense why all 4 officials have been suspended.
All four officials involved in Newcastle penalty mistake replaced this weekend