The United States military has struck a number of cities in Yemen, including the capital, Sanaa, and the key port city of Hodeidah, according to the Houthi-run Al Masirah TV network.
Four strikes targeted Sanaa and seven hit Hodeidah on Friday, Al Masirah said. Correspondents with the AFP news agency also reported hearing loud explosions in both cities.
The Hodeidah strikes hit the airport and the Katheib area, which has a Houthi-controlled military base, Al Masirah said. Footage on social media verified by Al Jazeera's fact-checking agency showed large plumes of smoke resulting from the strikes in Hodeidah.
At least one strike hit Dhamar province, and air raids took place in Bayda province, southeast of Sanaa, the Houthi media office also said.
There was no immediate comment from the US. However, The Associated Press news agency quoted unnamed US officials as saying the country conducted the strikes to target weapons systems, bases and other equipment belonging to the Iran-backed Houthis.
Military aircraft and warships bombed Houthi strongholds at roughly five locations, the AP said, quoting the officials.
Al Masirah, which did not elaborate on any damage or casualties, said the United Kingdom also participated in the attacks.
But the UK Ministry of Defence has categorically denied any involvement in the strikes, according to an official who spoke to the Al Jazeera office in London.
Washington has repeatedly struck Houthi targets in Yemen since January in response to attacks by the group on shipping in the Red Sea and the Gulf of Aden.
The Houthis say their strikes, which have disrupted maritime traffic in a globally important waterway, target vessels linked to Israel and are intended to signal solidarity with Palestinians and opposition to Israel's war on Gaza.
Now as the conflict between Israel and Hezbollah, another Iran-backed group, escalates with Israeli strikes killing about 2,000 people in Lebanon, the Houthis are also demanding Israel halt its assault there.
'Yemen will not be deterred'
Israel has also struck Yemen with Israeli strikes on Hodeidah last month killing at least five people after the group said it targeted Israel's Ben Gurion Airport with a missile.
The latest strikes came a day after the Houthis said they carried out a drone attack on Tel Aviv. The Israeli military said it intercepted "a suspicious aerial target" off central Israel overnight without giving further details.
The attacks also come just days after the Houthis threatened "escalating military operations" targeting Israel after they apparently shot down a US military drone flying over Yemen. And just last week, the group claimed responsibility for an attack targeting American warships.
The rebels fired more than a half-dozen ballistic missiles and antiship cruise missiles and launched two drones at three US ships that were travelling through the Bab al-Mandeb strait, but all were intercepted by navy destroyers, according to several US officials.
The officials spoke on condition of anonymity to discuss details not yet publicly released.
On Friday, thousands of people took to the streets of Sanaa to express solidarity with the Palestinians and Lebanese people amid intensified attacks by Israel.
"The aggression on the capital and Yemeni governorates after the ... solidarity marches with Lebanon and Gaza is a desperate attempt to terrorise our people," Houthi official Hashem Sharaf al-Din told Al Masirah.
"Yemen will not be deterred by these attacks and will continue its steadfastness in confronting the enemies with all its strength."
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