Muslim plot to blow up the Jubilee Line in London foiled by observant passengers

A suspected viable improvised explosive device (IED) described as a bag with wires sticking out, was found on Thursday on a London Jubilee Line Underground train.

'It is unknown who placed the device and what their motivation was [we can make an accurate guess]. Therefore it remains possible that the perpetrator may attempt to place further devices. The threat level will continue to be reviewed as further information is received,' said a police spokesman.

Update: a 19-year-old 'Asian' was arrested in connection with this plot.  Story