The self-proclaimed "Islamic State" (IS) is a Sunni Islamist rebel group which controls territory in Iraq and Syria. It is also active in eastern Libya and Egypt's Sinai Peninsula, among other places.
The United Nations has accused "IS" of committing human rights abuses, mass executions and war crimes. The terror group is known for its social media and web propaganda, which includes online videos of the beheadings of soldiers, journalists and aid workers. It is largely financed by income from the oil fields in Syria and Iraq, and private donations, often from the Gulf states Qatar and Saudi Arabia. DW's recent content tagged with "Islamic State" or "IS" appears on this page.
In Spain, it was a night of bloodshed, fear and confusion - first in Barcelona and then in the town of Cambrils. Islamic State has claimed responsibility for the attack in Barcelona, in which a van was driven into pedestrians on the popular Ramblas boulevard. That attack left at least 13 people dead and more than 100 injured. More from correspondent Guy Hedgecoe in Barcelona.
A night of terror and bloodshed in Barcelona - Is the honeymoon over for the new French President? - A deportation order in the Netherlands tests Dutch tolerance - Can the Brits survive without Big Ben? - The locals of Lisbon count the cost of living in a tourist hotspot - The appeal of popularism in Slovakia - Should Germans be paying more for their groceries?
German Chancellor Angela Merkel has issued a message of defiance after Thursday's terrorist attacks in and around Barcelona, which killed 14 people and injured hundreds. Many international leaders offered condolences.