rome figure jump small boat clear shallow water run ashore italian beach look like troop practice d-day-style land drill soldier image catch camera show become increasingly common sight beach italy southern islands migrants africa land broad daylight past boat come night say claudio lombardo local head mareamico friend sea environmental group film scene beach near agrigento sicily wednesday morning come night saw abandon boat beach next day people nowhere find call ghost boat change tactic people smugglers come number arrivals libya long busy route migrants africa try reach european union plummet since departures coastal city sabratha stop shadowy arm group summer libyan departures slump wooden boat neighbor tunisia start land seclude sicilian beach often broad daylight tourists sunbathe official lead investigation arrivals tell reuters 3,000 migrants mostly men come tunisia past two months 1,500-1,800 land south coast sicily rest small islands lampedusa linosa say local investigator speak condition anonymity still few libyan arrivals total well 10,000 past two months number see since tunisia arab spring revolution 2010 2011 say lombardo whose priority protect beach damage cause abandon boat belong reach small islands almost identify police 20 40 percent make sicily vanish without trace official say almost tunisians already expel italy past investigator say agrigento court look see smugglers pick upon arrival italy concern ones try flee perhaps could problems law either tunisia italy say 50-or-so film lombardo climb dry hill beyond beach head inland discard t-shirts shoe kit bag change clothe bottle water milk lombardo say within 30 minutes disappear go police pick many find walk along roads investigator say thursday one young tunisian man kill car hit-and-run near agrigento boat big enough make 200-km 125-mile cross tunisia small raise question get exclude existence mother ship investigator say refer large fish boat use past ferry migrants close coast put onto small boat last leg voyage 'ghost boat drop tunisian migrants onto sunny italian tourist beach