Officials are seeking to calm speculation after the deaths of several candidates, including seven from the Alternative for Germany, which said it was "saddened" by the news.
New Zealander Tom Phillips was on the run for nearly four years before being shot during a confrontation with police after a suspected robbery in the early hours of Monday morning.
Dozens of civilians and police officers were injured during clashes over a controversial government decision to block several major social media sites.
Israel has strongly denied that its actions in Gaza amount to genocide, but is being challenged on the issue in a case at the International Court of Justice in The Hague.