Israeli navy ships have struck targets in the port city of Hudaydah in Houthi-controlled Yemen.
The Israeli military said in a statement the strikes were carried out in response to Houthi missiles targeting Israel and were aimed at stopping the use of the port for "military purposes".
There were no immediate reports of casualties.
Images posted on social media showed black plumes of smoke rising from the port, with Houthi-run al-Masirah TV reporting two separate strikes.
The Houthis have regularly launched missiles at Israel in solidarity with Palestinians in Gaza. On Thursday, a Houthi missile was intercepted above Jerusalem, while last month one hit the grounds of Israel's main airport.
