Heavy airstrikes by the Saudi-led coalition have rocked Yemen's capital, striking Sanaa's densely populated neighbourhoods in apparent retaliation for the killing of former President Ali Abdullah Saleh by the Shiite rebels who control the city.
Much is likely to depend on the future allegiances of his loyalists, who had previously helped the armed Houthi group, which hails from the Zaidi branch of Shi'ite Islam that ruled a thousand-year kingdom in northern Yemen until 1962. His supporters may still be able to have some impact on the war.
His son Ahmed Ali has lived under house arrest in the United Arab Emirates, where he once served as ambassador before it joined ally Saudi Arabia to make war on the Houthis, who until this week had ruled much of Yemen together with Saleh . His reported first public statement may indicate that his former enemies in the coalition are unleashing him against the Houthis.
Ahmed Ali may be the family's last chance to win back influence.
The whereabouts of Saleh's other key relatives, who had led six days of street battles against the Houthis in the capital Sanaa before being routed on Monday, were unknown.
The world body says millions of people may die in one of the worst famines of modern times, caused by warring parties blocking food supplies.
Hours after Houthis announced the death of Saleh, the Houthi leader Abdul-Malik al-Houthi made a televised speech, saying his group had "foiled a plot by ex-president Saleh to involve all Yemeni people in armed chaos". He is still loved in much of the north and many supporters will bear a grudge towards his killers.
Bessho said the 15-member council was deeply concerned about the sharp escalation in violence as well as "the dire and deteriorating" humanitarian situation in Yemen. "The war will not end soon", said Aswan Abdu Khalid, an academic at the psychology department at the University of Aden.