1 of 3
Hani Mohammed, Associated Press
Hawthi Shiite protesters perform Friday prayers during a funeral procession of fellow protesters who were killed in recent clashes with Yemeni police in Sanaa, Yemen, Friday, Sept. 12, 2014.

SANAA, Yemen — Yemeni troops on Saturday clashed with Shiite rebels who have been demonstrating in the capital for weeks demanding the resignation of the government, throwing a deal to end the standoff into question and raising fears of a wider conflict.

The clashes broke out in a northwestern district of the capital Sanaa near a state TV building, when troops stopped a rebel truck loaded with weapons, military officials said. They said there was no word yet on casualties and that the army had secured the area. They spoke on condition of anonymity because they were not authorized to speak to the press.

The flare-up came as the Shiite rebel group, known as the Hawthis, was said to have been close to signing a deal reached through an international mediator.

According to top government officials, the deal includes the appointment of a new prime minister and the further restoration of fuel subsidies. The crisis was sparked by the government's decision to slash the subsidies in late July as part of an austerity plan. Yemen is one of the poorest countries in the Arab world.

The officials said the Hawthis insist on signing the deal in their stronghold in the northern city of Saada, while the president wants to sign it in the capital.

The Hawthis are rapidly emerging as one of the most potent armed groups in the country. They waged a six-year rebellion that ended in 2010 with a cease-fire deal, and for months they have been battling and defeating Sunni armed tribesmen in the north. The Hawthis control the northern province of Saada and have a strong presence in cities near the Saudi border.

Yemen is also grappling with a potent al-Qaida affiliate that mainly operates in the south and east, as well as an increasingly assertive southern separatist movement. The United States has long provided aid to Yemen's counterterrorism forces and regularly carries out drone strikes aimed at al-Qaida militants.