Wikipedia says the hatch was combat locked, but there is really no way that I can see to attack the hatch with bolt cutters. I suspect (and this is entirely speculation) that the true detail missing on Wikipedia may be that one of the hatches was locked from the outside with a padlock, which is a common way of securing other military vehicles when they are in depots. If the lock was cut and the hatch was not locked from the inside, that would be the way police got access.