▁and ▁N uc lear ▁Saf ety ▁of ▁France , ▁indicated ▁that ▁the ▁relatively ▁high ▁levels ▁in ▁the ▁beginning ▁of ▁October ▁have ▁stead ily ▁decre ased ▁from ▁ 6 ▁October , ▁while ▁no ▁radio active ▁element ▁was ▁detected ▁after ▁ 1 3 ▁October . ▁ ▁References ▁ ▁External ▁links ▁▁▁ ▁Report ▁on ▁the ▁I RS N ▁investigation ▁of ▁the ▁incident , ▁January ▁ 2 0 1 8 ▁ ▁Category : Se ptember ▁ 2 0 1 7 ▁events ▁in ▁Russia ▁Category : 2 0 1 7 ▁in ▁the ▁environment ▁Category : Rad iation ▁acc idents ▁and ▁inc idents ▁Category : N uc lear ▁energy ▁in ▁Russia ▁Category : Environment ▁of ▁Europe ▁Category : Environment ▁of ▁Russia ▁Category : R uth enium ▁Category : Se ptember ▁ 2 0 1 7 ▁events ▁in ▁Europe <0x0A> </s> ▁G av k ul ▁( , ▁also ▁Roman ized ▁as ▁G ā v k ū l ) ▁is ▁a ▁village ▁in ▁Kh ara ▁Rud ▁R ural ▁District , ▁in ▁the ▁Central ▁District ▁of ▁S iah kal ▁County , ▁Gil an ▁Province , ▁Iran . ▁At ▁the ▁ 2 0 0 6 ▁census , ▁its ▁population ▁was ▁ 2 6 5 , ▁in ▁ 6 0 ▁families . ▁ ▁References ▁▁ ▁Category : Pop ulated ▁places ▁in ▁S iah kal ▁County <0x0A> </s> ▁Sof a ▁is ▁a ▁Mand ink a ▁term ▁for ▁slave ▁soldiers ▁who ▁served ▁in ▁the ▁army ▁of ▁the ▁M ali ▁Empire . ▁Sof as ▁would ▁also ▁fight , ▁in ▁varying ▁capac ities , ▁in ▁the ▁arm ies