The Irish government will intervene in the case taken by South Africa and argue that restricting food and other essentials in Gaza may constitute genocidal intent, the foreign minister Micheál Martin said on Wednesday.

“We believe there is a case, given how this war has been conducted,” Martin said.

“We will be inviting the court to consider the issue of broadening how you determine whether genocide has taken place or not on the basis of an entire population being collectively punished.”

A clear pattern of behaviour had impeded humanitarian aid, resulting in widespread suffering, he said. “Half the population of Gaza is facing famine and 100% is experiencing food insecurity.”