Ginza line incident just before Asakusa?

Was on the Ginza line today, all going well, and then before we departed Tawaramachi, I hearda scream, sirens started going off and station staff started sprinting (yes, sprinting) down the platform. It delayed the train by about 10 mins I think?

Had the worst feeling and it kinda scared me/got me down, bc of the possible implication. Just wondering if anyone knows exactly what happened, of if something like this has happened before (almost defo I'd say).

by GhostsInMyAss