Ali Abdullah Saleh, Yemen's former president and longtime strongman, has been killed, according to multiple Yemeni officials, as his loyalists and Shi'ite rebels battled for control of the capital.
Multiple images and videos of what appeared to be Saleh's dead body were posted to social media sites, though could not be immediately confirmed.
However, Saleh's party said the ex-president had been killed outside Sanaa.
Saleh was once allied with the rebel Houthis, a Shiite group linked with Iran.
The head of the Houthis' Ansarullah group warned that the biggest victor from what he described as Saleh's "sedition" was the Saudi-led coalition.
A Houthi media official, Abdel-Rahman al-Ahnomi said Houthi fighters killed Mr Saleh as he tried to flee to Saudi Arabia though the province of Marib, to the east of the capital. The Houthis dominate the northern part of the city, while Saleh's forces hold the southern part, with much of the current fighting concentrated around the Political District, home to ministries and foreign embassies.
We hope Saleh's supporters stop fighting.
Analysts say the alliance fell apart after Saleh reached out to the Saudi-led coalition fighting the Houthis.More news: Guardiola regrets Redmond rant after City victory
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United Nations humanitarian affairs chief Mark Lowcock said on Friday that the Saudi-led military coalition must fully lift its blockade on Yemen, where 7 or 8 million are "right on the brink of starvation", Reuters reported.
Saleh, 75, ruled Yemen for more than three decades until his ouster under popular pressure in 2012.
Smoke rises during the battle between former Yemeni President Ali Abdullah Saleh's supporters and Houthi rebels in Sanaa on December 2. He remained in the country, however, and continued to wield power from behind the scenes.
The stalemated war has killed more than 10,000 civilians and displaced 3 million.
Internal rifts have shaken the fragile alliance between the Houthis and Saleh loyalists, who joined ranks in 2014 to seize Sanaa.
In this January 3, 2017 file photo, tribesmen loyal to Houthi rebels chant slogans during a gathering aimed at mobilizing more fighters into battlefronts to fight pro-government forces.
Almost one million people have been infected by cholera in Yemen this year, including more than 2,200 people who have died, according to the World Health Organization.