The United States and its allies have launched a series of airstrikes against Houthi targets in Yemen, in response to recent attacks on shipping in the Red Sea and Gulf of Aden.
The airstrikes, which began early on Friday, targeted Houthi-controlled radar and communication facilities in the port city of Hodeidah, as well as other locations in western Yemen.
There were no immediate reports of casualties.
The Houthis, who control much of northern Yemen, have not yet commented on the airstrikes.
The US and its allies have accused the Houthis of being backed by Iran, and of carrying out the recent attacks on shipping with Iranian assistance.
The Houthis have denied any involvement in the attacks, and have accused the US and its allies of waging a war of aggression against Yemen.
The airstrikes are likely to further escalate the conflict in Yemen, which has been ongoing for more than seven years.
The United Nations has called for a ceasefire in Yemen, and for all sides to engage in peace talks.
It is not yet clear what the long-term impact of the airstrikes will be. However, they are likely to further destabilize the situation in Yemen, and to make it more difficult to reach a peaceful resolution to the conflict.