Law enforcement officers have detained a man who entered the building of the Cabinet of Ministers of Ukraine and threatened to detonate a grenade. According to the media, the suspect threatened two security guards and a government administration employee. The chief of the Ukrainian National Police, Ihor Klymenko, identified the suspect as a veteran of the war against Russia-backed separatists in Ukraine's east. He said the suspect had been wounded twice in that fighting, including suffering a head injury. Special police forces were called to the scene around 10 a.m. after an unknown man entered the building of the Cabinet of Ministers of Ukraine, took out an object looking like an explosive device from his pocket, and threatened to detonate it, police said. Klymenko said an investigation was under way and the man's motives were still unclear.