Heathrow Bomb Scare
Earlier today a suspect package was found in Heathrow Airport. Terminal 2 was evacuated. A man has since been arrested under anti-terrorism laws. Reports say that a man was "seen running in and dropping a bag at the check-in area."
Details are few and sketchy but, given that a man has been arrested for terrorism, this is probably more than just a misunderstanding or a forgotten bag.
UPDATE: Reuters reports that a preliminary test by police did reveal explosives but not enough for a viable bomb.
UPDATE: A report says that the incident took place at an Air Algeria check-in desk, although the article dismisses the event as "more like a hoax". You don't normally get arrested under the Terrorism Act for hoaxes, or mistakes.