Houthi militants said the US and UK killed at least 16 people with airstrikes on Yemen on Thursday, in the deadliest assault on the group since the start of a campaign in January to prevent its attacks on ships around the Red Sea.

The Iran-backed militant organization on Friday said it targeted a US aircraft carrier in the area, the Dwight D. Eisenhower, in response. Though, there was no attack in the vicinity of the ship and it wasn’t hit, a Politico reporter said, citing a US Defense Department official.

The Houthis have regularly aim at US naval vessels this year with drones and missiles, all of them missing or being intercepted.

The US and UK militaries struck 13 Houthi targets in Yemen with their latest assault. The Houthis said some of those who died were civilians in the port city of Hodeida. Sanaa, the capital, and other areas were also struck, the Houthis said.