TUNIS - The widow of assassinated politician Chokri Belaid said on Saturday she was asking the Tunisian government to provide her family with official protection.

"After the killing of Chokri I am asking the Ministry of the Interior to provide official protection to me I and my daughters ... If any attack happens to the family, I will accuse the Ministry of Interior officially," Basma Belaid said On television.

Belaid's killing by an unidentified gunman on Wednesday -- Tunisia's first such political assassination in decades -- has shaken a nation still seeking stability after the overthrow of veteran strongman Zine al-Abidine Ben Ali in January 2011.

Belaid's family has accused the ruling Islamist party Ennahda of responsibility for his killing. The party denies any hand in it.