Incident at Heathrow?

LGF has directed me to the blog Cynical Nation, which is alerting us to a possible terrorist incident at Heathrow airport:

This hasn't hit the news yet, but my brother-in-law is sitting on a plane in Heathrow Airport as we speak, and there is apparently some action going on. It seems his plane was stormed by agents with machine guns, who seized a Middle Eastern passenger from my brother-in-law's row and removed him from the plane.

There are updates below, and likely more as time passes, so be sure to check in.