The sky over a Sanaa neighbourhood is illuminated by anti-aircraft fire as the Saudi-led coalition intensified airstrikes on Houthi positions in the capital of Yemen yesterday. The Saudi-led forces are trying to restore exiled President Abedrabbo Mansour Hadi, who left as the Houthi rebels swept across Yemen last year. The rebels still control Sanaa, a year after they overran it with support from renegade troops loyal to Mr Hadi's predecessor, Mr Ali Abdullah Saleh. But they have lost territory in the south since late July, when the coalition began deploying ground troops.