Switzerland is renewing direct talks with North Korea as tensions rise on the peninsula. Seoul hopes the Swiss office will help it engage with Pyongyang.
The violence followed largely peaceful protests earlier on Saturday and came amid a wave of similar demonstrations across Europe. The unrest was reminiscent of scenes across France last month.
Iranian officials have nevertheless noted positive steps in mediated negotiations with the US, which is gearing up for key midterm elections next week.
Europe and Germany risk deindustrialisation, Kärcher CEO Hartmut Jenner has warned. He is urging major cuts in bureaucracy, incentives for extra work and a firm EU trade policy towards China and the US.
Telegram war monitoring channels said an attack targeted the Kstovo oil refinery, also known as the Lukoil-Nizhegorodnefteorgsintez refinery, thought to be one of Russia's largest such facilities.