Police are on scene at the Royal Arsenal site in Woolwich after people on mopeds were reported to have threatened a number of people with weapons.
Two men were seen on a moped attempting the attacks. Motivation for the attacks is not yet known. Others report the moped being driven at people with one member of the public attempting to hit them.
If anyone saw anything – and it was busy at the time – call police on 101 or 999 if urgent.