Videos on social media showed cars set on fire during running battles as protests entered their fifth day.
Dr Dirk Brandherm and his colleagues have identified more than 600 suspected house platforms in the Brusselstown Ring.
To succeed in office he will need to keep his supporters engaged with day-to-day governing, experts say.
Reports of fireworks and other explosives being thrown are widespread across the country.
Several dozen people are presumed to have died in the fire at a New Year party in the resort of Crans-Montana.
Around 100 are also injured in fire at Crans-Montana Swiss ski resort bar Le Constellation.
The latest strike comes as the US Coast Guard searches for survivors of another that happened a day earlier.
Fans gathered at premieres in cities across the US and Canada to watch the finale on the big screen.
Dozens of people are believed to have died after a fire broke out during New Year's Eve celebrations.
A currency collapse has led to protests breaking out across the country, with unrest reported in several cities.
The blaze was thought to have started just after midnight and was swiftly declared a major fire
The blaze was thought to have started just after midnight and was swiftly declared a major fire
Brazil and Real Madrid legend Roberto Carlos is "recovering well" after undergoing what he describes as "a preventative medical procedure".
The Democratic politician took his oath over a Quran in the disused Old City Hall subway station.
The Democratic politician took his oath over a Quran in the disused Old City Hall subway station.
The Democratic politician took his oath over a Quran in the disused Old City Hall subway station.
Russian President Vladimir Putin used his New Year speech to tell troops that he "believed in you and our victory" in Ukraine.
The worker is "recovering" after he was seen on video being knocked off his feet by the 400-lb (180kg) rubber Indiana Jones prop.
The worker is "recovering" after he was seen on video being knocked off his feet by the 400-lb (181kg) rubber Indiana Jones prop.
Marcus Alexander Muench Casanova, 19, who fatally fell 500 feet (150m) from a trail, was an "avid sailor and outdoorsman", his family says.
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