TEL AVIV, Israel — The rockets from Gaza have mostly fallen silent. A ceasefire with Hezbollah militants in Lebanon has taken hold. But repeated fire from Yemen’s Houthi rebels, a faraway foe, is proving a stubborn threat for Israel.

The US THAAD system is under fire after another reported failure to intercept Houthi missiles in Israel. Houthi official Nasruddin Amer reportedly mocked US and Israeli defences, claiming no system can counter hypersonic missiles.

Air raid sirens sounded in Tel Aviv Monday after reports of a missile launch from Yemen, sending residents running for shelter.

The Iranian-backed Houthi militia in Yemen on Tuesday claimed to have attacked the international airport in Tel Aviv as well as targets in Jerusalem. Houthi military spokesman Yehya Saree said in a televised statement that Tel Aviv's Ben Gurion Airport and an electricity plant in the Jerusalem area had been attacked with ballistic missiles.