According to the newspaper, the explosion occurred on the outskirts of the city. The bomb was hidden in the garbage can. As a result of the explosion, four passers-by were injured: two Moroccans and two Italians, including a 83-year-old retiree.
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The blast wave has also caused damage to four cars that were parked nearby and the windows of 30 buildings situated in the area, the news outlet added.
In course of the searches in the area of the explosion, the police have found 12 more homemade bombs and ammunition.
The police are currently determining the identity of the bombs' maker.