Sakura hasn't been mistaken. Someone was indeed trying to come into this little circle of hell The Hand had made for her. The question was who? Clearly, not one of their minions. They'd have a key. Sakura could hear the rattling of the lock as someone worked it. Perhaps an enemy, a rival... But who? The pain kept her from being able to really run in down the mental list.
She heard the lock click as someone picked it open. She could hear three sets of footsteps entering the room but could not see them beyond the light. She gave a little sound of fear. Hopefully, they'd end things.. One way or another