Pro-Russian separatist protesters in the eastern Ukraine towns of Kharkiv, Donetsk and Luhansk called Monday on Vladimir Putin to send over “peacemakers” to secure their independence. Wearing military uniforms and steel helmets, they seized public buildings and set up barbed wire barricades. Prime Minister Arseny Yatseniuk accused “foreign troops” of stirring up unrest in the three embattled towns as part of a plan to destabilize Ukraine and bring in Russian troops.