From Sky News:
Criminal gangs are increasingly using heavy duty weapons such as AK-47 assault rifles, thought to arrive in the city through its Mediterranean sea port.
Two murders earlier this month also saw an 18-year-old stabbed in the chest during a fight outside a nightclub and a 25-year-old man shot in his car by men on a motorbike.
The government has said it is sending in 130 extra riot police – who will be patrolling the city by the end of the month – as well as 24 more detectives.
But many residents of the southern city are critical of that response and say politicians are not doing enough.
“Today finished the soundbites and rhetoric … The city needs action!” says the petition.
“Or are we preparing to always call more police and army … then Batman!”