- cor ruption ▁branch ▁of ▁the ▁Central ▁Bureau ▁of ▁Investig ation ▁also ▁oper ates ▁out ▁of ▁the ▁city . ▁C IS F ▁maintain s ▁ 3 ▁squad rons ▁for ▁providing ▁security ▁to ▁various ▁central ▁and ▁state ▁heavy ▁indust ries , ▁air port ▁and ▁se ap ort ▁zones . ▁Other ▁major ▁central ▁ag encies ▁are ▁N IA , ▁D RI ▁and ▁Indian ▁Custom s ▁due ▁to ▁the ▁presence ▁of ▁major ▁port . ▁According ▁to ▁National ▁Crime ▁Records ▁Bureau ▁( N CR B ), ▁Koch i ▁reported ▁significant ▁increase ▁of ▁ 1 9 3 . 7 ▁per ▁cent ▁IP C ▁cr imes ▁in ▁ 2 0 1 0 ▁compared ▁to ▁ 2 0 0 9 , ▁and ▁reported ▁a ▁crime ▁rate ▁of ▁ 1 , 8 9 7 . 8 ▁compared ▁to ▁the ▁ 4 2 4 . 1 ▁in ▁whole ▁Ker ala . ▁However , ▁Koch i ▁Police ▁officials ▁def ended ▁that ▁in ▁major ▁cr imes ▁such ▁as ▁mur ders ▁and ▁kid n apping , ▁the ▁city ▁registered ▁a ▁low ▁crime ▁rate ▁even ▁behind ▁other ▁cities ▁in ▁the ▁state . ▁During ▁the ▁ra iny ▁season , ▁a ▁large ▁number ▁of ▁organ ised ▁burg l ars ▁come ▁to ▁Koch i ▁from ▁Th ir utt u ▁Gram am ▁( V ill age ▁of ▁th ieves ) ▁near ▁Tir un el vel i ▁in ▁T amil ▁N adu ▁and ▁conduct ▁a ▁series ▁of ▁burg l aries . ▁ ▁Rec ently ▁the ▁Ker ala ▁police ▁has ▁sought ▁the ▁assistance ▁of ▁various ▁residents ' ▁associations ▁of ▁C och in