NEW ORLEANS (AP) — Throughout the quieter parts of the French Quarter, residents and businesses have posted signs that read Caution: During Carnival, the streets crawl not only with partiers but with cops, state troopers, federal agents and private security officers. Despite their presence, shootings have occurred in nightclubs, on Bourbon Street, or along Carnival parade routes — many of which end at or near the Quarter — in at least eight of the past 11 years. At least 27 people were injured and one killed in those attacks. Since November, a series of more than 60 robberies in and around the Quarter has shocked residents and sparked outrage directed not so much at the New Orleans Police Department but at Mayor Mitch Landrieu, who is pushing back against complaints that he paints a too-flattering picture of his crime-fighting efforts. Applying pressure on Landrieu has been Sidney Torres IV, a wealthy 39-year-old French Quarter entrepreneur, who paid for a series of TV ads blaming the mayor.