The UN special envoy to Yemen Ismail Ould Cheikh Ahmed arrived in Sanaa on Sunday to press efforts to broker a ceasefire in the war-torn country.

The UN special envoy to Yemen Ismail Ould Cheikh Ahmed arrived in Sanaa on Sunday to press efforts to broker a ceasefire in the war-torn country.

Ould Cheikh hoped to secure a humanitarian truce “rapidly,” he told reporters at the airport.

The international envoy said that the ceasefire could pave the way for a "peaceful settlement of the crisis which has turned into a catastrophe."

Meanwhile, the brutal Saudi aggression on the Arab impoverished country continued, with Saudi-led warplanes bombed several areas across Aden, killing six, including a child, officials said.

The dead from the Katyusha fire were Somali refugees who had sought shelter in a kindergarten, medics said.

Yemen has been since March 26 under brutal aggression by Saudi-led coalition. Thousands have been martyred and injured in the attack, with the vast majority of them are civilians.

Riyadh launched the attack on Yemen in a bid to restore power to Yemen’s fugitive president Abd Rabbuh Mansour Hadi who is a close ally to Saudi Arabia.

On Wednesday, the United Nations declared Yemen a level three emergency, the highest on its scale.