Explosions shook the suburbs of the Yemeni port city of Aden on Monday as residents reported a foreign warship shelling Houthi positions on the outskirts of the city.
Street fighting and heavy shelling has for several days torn through the city, the last bastion of support for Saudi-backed president Abd-Rabbu Mansour Hadi.
Twelve days of bombing by a Saudi-led coalition has failed to halt the advance of the Iran-allied Houthis that has triggered a growing humanitarian crisis for residents in central districts now cut off from the mainland.