Ukrainian President Volodymyr Zelensky's office has said that he has postponed all his upcoming foreign visits amid a new Russian offensive.

Zelensky canceled all foreign visits "that were planned for the coming days", his office said on Wednesday on Telegram.

The head of state instructed his team to reschedule the visits.

"We are grateful to our partners for understanding," the announcement said.

Zelensky had been expected to visit Spain, and perhaps Portugal.

Both Ukraine and Russia are increasingly using drones to carry out short-range, as well as long-range attacks.

Ukraine and the West were caught by surprise by the Russian advance in the Kharkiv region and Putin’s troops seized a number of settlements including parts of the town of Vovchansk.

The Russian defense ministry also said on Wednesday that its air forces destroyed ten long-range missiles known as ATACMS that Ukraine’s military launched overnight at Crimea.