That sucks!!
Find out everything you can about the incident and use that information when evaluating your safety.
Be careful! Random things happen in random places at random times. Don't let your guard down, but don't get paranoid.

Edit: Oh! you are in the UK! Guns are completely illegal there, aren't they?
KindMidasSoundman Reviewed by KindMidasSoundman on . Murder in my street I woke up around 8:30 this morning, got the clearing up and general house hold shit done. Sat down and rolled my first J of the Day sparked it up then opend the curtains to see about 30 police officers in my street. Put that J down and went outside to find out what was happening. A man from 10 doors down the road was stabbed to death at 5 this morning. I didn't know the guy but it sucks having this on your doorstep. Rating: 5