BERLIN—Ten Belarusians have asked Germany’s federal prosecutor to open a criminal investigation against President Alexander Lukashenko and security officers for alleged crimes against humanity during a crackdown on protests. Lawyers who brought the case for the 10, who are now living across Europe, cited universal jurisdiction laws that allow Germany to try crimes against humanity committed anywhere in the world. “All clients have reported of spurious arrests, torture, and abuse during the days of their imprisonment … Each of our clients has suffered severe health consequences,” the lawyers said. Minsk did not immediately comment. The Belarusian authorities have characterized the protesters as criminals or violent revolutionaries backed by the West and described the actions of law enforcement agencies as adequate and necessary. Lukashenko has faced street protests since a presidential election last August that the opposition says was rigged to enable him to win. Police have arrested thousands of protesters. …