Ukraine struck Iranian ships in the Caspian Sea. Iran says the strike killed one sailor.

Others were hurt on the ship. Iran called it a hostile and criminal act.

Iran called in Ukraine's top diplomat in Tehran to protest. Iran said the strike broke international law.

Iran warned the attack could worsen the Russia-Ukraine war. Ukrainian President Zelensky called the Caspian strikes part of wider long-range attacks.

He said Ukrainian forces also hit a Russian warship. Forces also struck targets inside Russia.

These included an oil refinery and a fuel depot. Zelensky said the Caspian attack was payback for Russian strikes.

He said it was not a separate Middle East attack. Ukraine claims Russia is giving Iran satellite information.

The strike comes amid growing tension across the Middle East. Saudi forces attacked Iran-backed Houthi fighters in Yemen. Houthi fighters attacked Saudi oil sites along the Red Sea coast.