An American F-16 fighter jet delivered to Ukraine was destroyed in a crash on Monday, a U.S. defense official told Reuters.

Iran Press/Europe: According to the official, the crash did not appear to be the result of Russian fire. It was still to be determined what caused the incident - pilot error or mechanical failure.

Russia staged a "massive" missile and drone attack on Ukraine on Monday, Ukraine's Air Force commander said, which was followed by another major strike on Tuesday.

The development came as President Volodymyr Zelenskiy claimed on Tuesday that F-16 jets were used to repel the attack on Monday and showed good results.

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