By Samia NakhoulANKARA, Sept 13 (Reuters) - The Houthi capture of Yemen's Red Sea coastline is reshaping the balance of power in the Gulf, strengthening Iran's hand and confronting Saudi Arabia and its neighbours with a difficult choice: absorb mounting costs or seek accommodation with Tehran.By securing a position overlooking Bab el-Mandeb, one of the world's most important shipping arteries, the Iran-aligned group has opened a second pressure point, threatening the Saudi oil exports diverted from the Strait of Hormuz.

The Bab el-Mandeb's importance to global oil supplies has grown since shipping through the nearby Strait of Hormuz has been impeded by Iran.

The Houthis’ interests converge with Iran’s strategic aims