What Happened in London Today?

There were reports today of a terrorist attack at Oxford Circus in central London's shopping district.  There were screams and people running.  Police and emergency services came quickly.  Many people were asked to shelter in place and stores locked their doors to keep those inside safe.  As of now, however, there are no victims, no evidence of shots fired, no suspects and generally no evidence of an attack.

So was this a new form of terror attack or was it just a hoax or a misunderstanding?  Imagine a very crowded shopping street at the start of the Christmas season to which we add seven or eight people who start screaming and yelling that there is a terror attack down the street.  It wouldn't take much to get people to start running in the opposite direction followed quickly by mass panic.  The terrorists could then just blend back into the crowd and watch the panic surround them.  Disrupting a major shopping venue like Oxford Street in London could cause a major economic disruption even if no one is injured.  Alternatively, we could just have some kids deciding to play a prank by doing the same thing.  Maybe we will learn the truth later, but I really doubt it.

The key at the moment, however, is that aside from one minor injury in the panic, no one has been hurt.