A demonstrator was killed in the central Tunisian town of Gafsa overnight Friday during a march protesting the assassination of opposition MP Mohamed Brahmi

A demonstrator was killed in the central Tunisian town of Gafsa overnight Friday during a march protesting the assassination of opposition MP Mohamed Brahmi, an AFP correspondent reported.

This came as s bomb wounded a policeman in a car park outside a police post in the port of Tunis on Saturday.
  
Protester Mohamed Moufli, 45, was killed as police used tear gas to break up the night-time march. He was struck in the head by a tear gas canister and died soon afterwards in hospital.
  
Police acted as hundreds of demonstrators tried to storm local government offices in the town centre.
  
Thousands demonstrated across Tunisia and the main General Union of Tunisian Labour (UGTT) staged a general strike Friday in protest at the assassination of Brahmi the day before.
  
Brahmi was gunned down with the same weapon used to kill another opposition politician, Chokri Belaid, six months earlier, Interior Minister Lotfi Ben Jeddou said. Brahmi is due to be buried later Saturday.

The blast that wounded a policeman hit at 5:45 am (0445 GMT) in La Goulette in the northern outskirts of the Tunisian capital, the witness and the Express FM and Shems FM radio stations said.
  
It occurred as a policeman approached a four-wheel drive vehicle parked in front of the post after garbage collectors spotted a suspicious object underneath it, the witness said.
  
Residents said they were awoken by the sound of the blast, causing many of them to panic.