Assassinated Tunisian opposition politician Mohamed Brahmi's wife Imbarka (R) and daughter Balkis mourn his death in Tunis (Photo: Reuters)

Tunisian opposition politician Mohamed Brahmi (Photo: AP)

The body of Tunisian opposition politician Mohamed Brahmi is carried into an ambulance after he was shot dead in Tunis (Photo: Reuters)

Assassinated Tunisian opposition politician Mohamed Brahmi's daughter Balkis (C) holds a Tunisian flag as she mourns his death in Tunis (Photo: Reuters)

Protesters shout slogans while marching on the streets in the capital of Tunis (Photo: Reuters)

A protester waves the Tunisian flag as she marches on the streets beside the riot police in the capital of Tunis (Photo: Reuters)

A protester raises her hand as she marches on the streets, while shops and banks close their doors, in the capital of Tunis (Photo: Reuters)

Thousands of protesters march on the streets, while shops and banks close their doors, in the capital of Tunis (Photo: Reuters)

Protesters clash with a policeman during a demonstration in the capital of Tunis (Photo: Reuters)

Supporters of the Islamist Ennahda movement wave flags as they chants slogans and hold a picture of assassinated politician Mohamed Brahmi during a demonstration in Tunis (Photo: Reuters)