[Ukrainian National Security Agency attacked, U.S. presidential envoy's visit plan "may change"] September 4th, Ukrainian President Zelensky posted on social media on the 4th that the headquarters of the Ukrainian National Security Agency in the center of Kiev, the capital of Ukraine, was attacked by a Russian drone that day. On the same day, Ukrainian media quoted sources as reporting that due to security concerns, the US presidential envoy Witkov, who plans to visit Russia and Ukraine, is considering other options to replace the visit. Zelensky said that a Russian drone hit the headquarters building of the Ukrainian State Security Service opposite the Hagia Sophia Church and deliberately attacked the director's office. Rescue agencies and law enforcement agencies such as the Ukrainian State Emergency Service were working on the scene. He has spoken with Alexander Pokrader, director of the Ukrainian National Security Agency, and instructed that once ready, there will be a "strong and reciprocal response" to Russia, and the Ukrainian military will provide support. (CCTV News)