Markets in Europe are set to start trading in the red after German authorities admitted the country suffered a terrorist attack.
The FTSE 100 is set to start 9 points lower at 7034.9, the DAX is expected 8 points lower at 11457.1, and the CAC is seen 11 points lower at 4838.5.
German authorities continue searching for a suspect who drove a truck into a Christmas market in Berlin, killing 12 people on Monday afternoon.
In Turkey, six people have been detained as authorities investigate the assassination of the Russian ambassador to the country on Monday evening.
Meanwhile in France, a number of banks are suing the European Central Bank over capital requirements, according to the Financial Times. Six French banks are at odds with the ECB over how much money they should put aside capital against money from special tax-free savings accounts.
The embattled Monte dei Paschi has raised 500 million euros in a voluntary debt-to-equity offer, according to Reuters. The bank needs to raise as much as 5 billion euros ($5.2 billion) before the year-end.
On the calendar, the Swedish Riksbank is announcing its latest rate decision and the euro zone will know its latest consumer confidence figures.