An attack attributed to the Saudi-led military coalition on a boat carrying Somalian civilians off the coast of Yemen was likely a war crime, Human Rights Watch said on Sunday.

The attack, which took place on March 16, resulted in the deaths of at least 32 of the 145 Somalian refugees on board, and one Yemeni civilian. Another 29 were wounded, as well as 10 who remain unaccounted for.

"The coalition's apparent firing on a boat filled with fleeing refugees is only the latest likely war crime in Yemen’s two-year-long war," said Sarah Leah Whitson, Middle East director at Human Rights Watch.

"Reckless disregard for the lives of civilians has reached a new level of depravity."

The war in Yemen has cost more than 10,000 lives since March 2015 and drove the country to the brink of famine.

-Agencies