▁four ▁regional ▁districts ▁( p ref e kt uur ), ▁where ▁all ▁duties ▁of ▁the ▁different ▁ag encies ▁are ▁exerc ised ▁and ▁carried ▁out . ▁Each ▁of ▁the ▁four ▁pre fect ures ▁is ▁combined ▁with ▁several ▁police ▁stations ▁and ▁customer ▁service ▁offices . ▁ ▁Polit se iam et ▁ ▁The ▁Est onian ▁Police ▁( E esti ▁Polit se i ▁in ▁Est onian ) ▁are ▁the ▁law ▁enfor cement ▁ag ency ▁of ▁Est onia . ▁The ▁Est onian ▁Police ▁has ▁three ▁national ▁units : ▁the ▁Central ▁C riminal ▁Police , ▁the ▁Central ▁Law ▁En for cement ▁and ▁the ▁For ens ic ▁Service ▁Centre . ▁There ▁are ▁four ▁territorial ▁police ▁units ▁called ▁police ▁pre fect ures . ▁The ▁local ▁police ▁chief s ▁are ▁called ▁pre fect s . ▁Eastern ▁Police ▁Department ▁Southern ▁Police ▁Department ▁Western ▁Police ▁Department ▁Northern ▁Police ▁Department ▁ ▁Currently , ▁there ▁are ▁twenty ▁oper ational ▁police ▁stations ▁and ▁facilities ▁in ▁Est onia . ▁ ▁P ii rival ve am et ▁ ▁The ▁Border ▁Guard ▁Board ▁is ▁an ▁armed ▁government al ▁organization ▁operating ▁since ▁January ▁ 2 0 1 0 ▁within ▁the ▁Ministry ▁of ▁Inter ior . ▁The ▁main ▁tasks ▁of ▁the ▁ag ency ▁is ▁to ▁guard ▁and ▁protect ▁the ▁state ▁borders ▁of ▁Est onia ▁on ▁land ▁and ▁at ▁sea , ▁to ▁prevent ▁the ▁for cible ▁change ▁of ▁borders ▁and ▁illegal ▁border ▁cross ings ▁and ▁to ▁prevent ▁illegal ▁goods ▁crossing ▁the ▁border . ▁In ▁addition , ▁the ▁Border ▁Guard ▁Board ▁has ▁further ▁respons ib ilities ▁which ▁also ▁include ▁the ▁border ▁control ▁pat rol