Caught this low-key item on the BBC:
German police have discovered an explosive device on a train line in the Berlin area - the fourth day in a row that devices have been found in and around the German capital. So far, there have been eight incidents of explosive devices being found. Police suspect a left-wing group of planting the firebombs, some of them on high-speed railway lines.
Link:http://www.bbc.co.uk/news/world-europe-15287806

The BBC links this other story:http://www.bbc.co.uk/news/world-europe-14585600

This appears to be the first, possible violent campaign in Western Europe by those opposed to a role in Afghanistan. From this armchair it could be one person or a very small group.