▁Q at ari ▁authorities ▁to ▁allow ▁them ▁to ▁communicate ▁with ▁the ▁N TC ▁as ▁well ▁as ▁re bel ▁forces ▁in ▁other ▁areas . ▁ ▁The ▁trigger ▁for ▁the ▁u pr ising , ▁the ▁so - called ▁" Zero ▁H our ", ▁was ▁the ▁speech ▁by ▁N TC ▁chairman ▁Must af a ▁Abd ul ▁J al il ▁in ▁which ▁he ▁said ▁that ▁the ▁no ose ▁is ▁tight ening ▁around ▁G add af i . ▁Att acks ▁on ▁command ▁and ▁control ▁cent res ▁by ▁re bel ▁cells ▁in ▁the ▁city ▁followed , ▁and ▁citizens ▁sympath etic ▁to ▁the ▁reb els ▁bar ric aded ▁streets ▁and ▁se aled ▁off ▁their ▁neighbourhood s ▁from ▁loyal ist ▁forces . ▁ ▁Ar ms ▁that ▁had ▁been ▁sm ugg led ▁into ▁the ▁city ▁were ▁distributed ▁by ▁anti - G add af i ▁activ ists ▁in ▁refuse ▁collection ▁tr uck s ▁the ▁morning ▁before ▁the ▁u pr ising . ▁ ▁Reb el ▁forces ▁advanced ▁east wards ▁from ▁Z aw i ya ▁and ▁entered ▁Tri pol i ▁through ▁the ▁Jan z ur ▁sub urb , ▁defe ating ▁the ▁K ham is ▁Brigade ▁at ▁its ▁H Q ▁in ▁Al ▁May a ▁before ▁entering ▁Tri pol i ▁proper . ▁Reb els ▁from ▁Mis r ata ▁land ed ▁by ▁sea ▁in ▁the ▁north ▁to ▁support ▁the ▁re bell ion ▁already ▁taking ▁place ▁in ▁the ▁city . ▁Reb els ▁hack ed ▁into ▁G add af i ▁loyal ists ▁communic ations , ▁hearing ▁them ▁pan ick ing ▁due ▁to ▁the ▁swift ▁re bel ▁advance ▁into ▁the ▁city