The two leaders placed flowers today at a makeshift memorial on the capital's Breitscheidplatz where a Tunisian man whose asylum application had been rejected drove a hijacked truck into the market, killing 12 and wounding dozens of others.
The Islamic State group claimed responsibility for the attack.
At a joint press conference ahead of visiting the site, Merkel and Hollande said Islamic extremism was a problem for all of Europe, and vowed to work together to fight it.
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