rome u.n. refugee agency seek open refugee transit center tripoli early next year resettle evacuate many 5,000 vulnerable refugees libya year senior u.n. official say friday small fraction total number libya migrant population estimate many million would welcome outlet 43,000 refugees unite nations high commissioner refugees unhcr estimate trap libya hope write authorization soon roberto mignone unhcr representative libya tell reuters rome u.n.-backed tripoli government already approve project verbally say center migrants able come go please former immigration police train facility refurbish able temporarily accommodate many 1,000 refugees could run early 2018 mignone say italy become main migrant route europe since agreement eu turkey shut smuggle greece last year arrivals fall sharply since july arm group clamp departures back european union italy finance train equip tripoli-based coast guard national election due early next year italy also promise tens millions euros prime minister fayez al-seraj municipal governments put stop smuggle strategy draw criticism humanitarian group point dire condition inside state detention center mignone say 6,000 hold much numerous camp smugglers hold migrants often extort force labor free italian interior minister marco minniti say depend u.n. refugee migration agencies improve condition refugees migrants trap libya solution mignone say also libya remain dangerous international staff still limit access country still many risk international staff say month-and-a-half ago attack u.n. convoy 30 km 19 miles tripoli bazookas machine gun miracle bad avoid 1,200 vulnerable refugees include women children sick disable elderly already release detention center request unhcr 800 let soon mignone say unhcr hop resettle many lengthy process many countries permanent diplomatic presence tripoli complicate matter agency seek evacuate mignone say emergency transit center romania slovakia even costa rica time apply resettlement agency currently work open another emergency transit center niger say u.n. aim open libyan transit center early next year senior official