Israel is signaling a wider campaign against Houthi militants in Yemen, a mountainous and impoverished country more than 1,000 miles from Israeli territory.

A Houthi political official says the group will continue attacking Israel in solidarity with the Palestinians despite the escalating Israeli air strikes in Yemen.Mohammed al-Bukhaiti told the BBC that the Houthis would "escalate our military targeting of Israel" until it stopped what he described as "the genocide in Gaza".

The head of the World Health Organization said on Friday he was not sure he was going to survive an air strike on Yemen's main airport carried out by Israel a day earlier during a series of attacks on the Iran-aligned Houthi movement.