KYIV, Ukraine (AP) — A Russian drone struck the headquarters of Ukraine’s security service in central Kyiv, President Volodymyr Zelenskyy said Friday, ahead of diplomatic talks with U.S. officials on ending the war.

The air war between Russia and Ukraine has intensified as the conflict stretches toward five years since Moscow’s invasion of its neighbor. Russia recently has been using fast-flying, jet-powered drones, and the recurring wail of air-raid sirens has become part of daily life in Kyiv.