Four Islamic State attacks leave 22 dead in two cities

Suicide bombings mark group's first known direct assault on government

Suicide bombers with the Islamic State group killed 22 people on Tuesday in attacks on Yemen's government and its Gulf Arab coalition ally in the port city of Aden and on a Houthi-run mosque in the capital, Sanaa, the jihadist group and state media said.

It was the first known direct Islamic State assault on the Yemeni government and the Saudi-led coalition that intervened in the country's civil war in March against Iranian-backed Houthi forces who had seized large areas of the country.