Coalition air strikes resume in Yemen

Coalition air strikes have resumed against rebel positions in Yemen's main southern city Aden after a five-day ceasefire expired on Sunday.

Air raids hit the rebel-held presidential palace in Aden as well as a base of the pro-rebel special forces in Yemen's second city, military officials and witnesses said.

The raids come despite calls by UN envoy to Yemen, Ismail Ould Cheik Ahmed, for an extension of the humanitarian ceasefire.

There has so far been no word from the Saudi-led coalition on whether the truce would be extended.

Since late March the coalition had been bombing Iran-backed Shi'ite Huthi rebels and their allies in Yemen, who had seized Sanaa and have swept across many other regions.

The truce was a Saudi initiative. It largely held, even as clashes between rebels and pro-government forces raged on.