Yemen's embattled President fled his palace in Aden for an undisclosed location on Wednesday as Shiite rebels offered cash bounty for his capture and arrested his Defense Minister.

Houthi fighters ride a patrol truck in Sanaa March 25, 2015. Houthi forces in Yemen backed by allied army units seized a key air base on Wednesday

"We are urging and advising our nationals to leave the country immediately through available commercial means," Spokesperson in the External Affairs Ministry said.

While noting that it was the third such advisory by the government, he hoped that the Indians, most of whom are nurses in Yemen, will understand the "seriousness" of the situation and will return.

Relatives of journalist Abdul Kareem al-Khaiwani attend his funeral procession in Sanaa

He added that the government was working with the nurses for their return while putting number of Indians in Yemen at 3,000-3,500 who are living in various provinces including

Yemen is witnessing attacks by Shiite militiamen on the President and other state figures.

Anti-Houthi protesters carry a fellow demonstrator who sustained injuries after pro-Houthi police troopers opened fire

The rising unrest has fuelled longtime divisions in Yemen, where the government, Huthis, southern separatists, powerful Sunni tribes and the local al Qaeda branch are all vying for influence.

The Indian Embassy in Sana'a had set up helplines to assist the Indians.

Anti-Houthi protesters run as pro-Houthi police troopers open fire to disperse them in Yemen's southwestern city of Taiz

Yemen's President Abed Rabbo Mansour Hadi left just hours after the rebels' own television station said they seized an air base where US troops and Europeans advised the country in its fight against al-Qaida militants.

That air base is only 60 kilometers away from Aden, the port city where Hadi had established a temporary capital.

People gather around the coffins of victims of suicide attacks during a mass funeral procession in Sanaa

The advance of the Shiite rebels, empowered by backing of the ousted Yemeni autocrat Ali Abdullah Saleh's loyalists, threatens to plunge the Arab world's poorest country into a civil war that could draw in its Gulf neighbours.

Already, Hadi has asked the United Nations to authorise a foreign military intervention in the country.

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