KYIV, Jan 3 – President Volodymyr Zelensky has warned of prolonged attacks on Ukrainian territory with Iranian Shahed kamikaze drones controlled by Russian invaders.

"We have information that Russia is planning a prolonged attack with 'Shaheds.' Its bet may be on exhaustion. On exhaustion of our people, our air defense, our energy sector... Now is the time when everyone involved in the protection of the sky should be especially attentive," Zelensky said in a video message on Monday evening.