MOSCOW—Belarus police detained over 100 people on Saturday, among them three editors of online news platforms, as they gathered for fresh protests against President Alexander Lukashenko, according to reports from the outlets and the Russian RIA state-run news agency. The city square in Minsk where the demonstration was called to start on Saturday afternoon was surrounded by police vehicles and prison vans, and roads leading to it were closed. No large-scale demonstrations took place at the site, though more than 100 people were detained during the course of the day, RIA cited a spokeswoman for the Belarus Interior Ministry as saying. Videos shared on Belarus opposition media channels showed black-clad police officers violently detaining people on the square and in other parts of the city, including what appeared to be passersby. In many videos, people detained did not appear to be carrying any banners or flags. Reuters could not immediately …