About 5 tons
Just a calculation.
If they came in 4 helicopters and the bars were standard 1 kilo, that means about 1100 bars per helo plus them men and equipment that came in with it.
Without knowing what kind of aircraft or how many, there's no way to know if it even could be done.
4400 pieces of ANYTHING is going to take time to move and we also have no timeframe.
Not impossible, but very unlikely that they pulled out this much bullion.