Uchiha Itachi formed hand seals right there.
Before the eyes of everyone in the restaurant, three puffs of white smoke burst out on either side of him with a soft pop. Three shadow clones swiftly stepped forward, their ghostly movement instantly grabbing Luffy, Sabo, and Ace by the collars and hoisting them into midair.
The three young troublemakers, who had been planning to run away, were startled by the sudden appearance of the Imperial Guards. But when they noticed that the man who had grabbed them was still standing in place, and that the ones dangling them in the air were three exact replicas of him, sheer astonishment washed over their faces as if they had seen ghosts.
Chapter 46