1 9 ▁a ▁number ▁of ▁European ▁nuclear ▁scientific ▁research ▁groups ▁published ▁" clear ▁evidence " ▁that ▁the ▁leak ▁origin ated ▁from ▁Southern ▁Ur als , ▁where ▁May ak ▁plant ▁is ▁located . ▁ ▁Tim eline ▁of ▁European ▁detection ▁and ▁public ▁notice ▁▁ ▁the ▁Swiss ▁Federal ▁Office ▁of ▁Public ▁Health ▁( F OP H ) ▁reported ▁increase ▁of ▁radio active ▁particles ▁of ▁r uth enium - 1 0 6 ▁since ▁ 2 5 ▁September ▁ ▁The ▁Aust rian ▁Ministry ▁of ▁the ▁Environment ▁informed ▁the ▁public ▁on ▁ 3 ▁October ▁ 2 0 1 7 ▁ ▁The ▁Norwegian ▁N uc lear ▁Saf ety ▁Author ity ▁( NR PA ) ▁also ▁released ▁information ▁on ▁low ▁levels ▁of ▁r uth enium ▁is ot ope ▁in ▁the ▁atmosphere ▁ ▁The ▁Greek ▁At omic ▁Energy ▁Commission ▁( EE AE ) ▁informed ▁of ▁increased ▁radiation ▁in ▁the ▁atmosphere ▁in ▁Ath ens ▁since ▁ 2 7 ▁September ▁Similar ▁announ c ements ▁came ▁from ▁other ▁authorities : ▁ ▁The ▁German ▁Office ▁for ▁Rad iation ▁Prote ction ▁reported ▁increased ▁radio activity ▁since ▁ 2 9 ▁September ▁ ▁The ▁Finn ish ▁Rad iation ▁and ▁N uc lear ▁Saf ety ▁Author ity ▁ST UK ▁issued ▁an ▁announ cement ▁on ▁ 3 ▁October ▁reporting ▁increased ▁radio activity ▁in ▁samples ▁since ▁ 2 8 ▁September ▁ ▁The ▁N uc lear ▁Saf ety ▁Administration ▁of ▁the ▁Republic ▁of ▁Sloven ia ▁announced ▁detection ▁of ▁low ▁levels ▁of ▁r uth enium - 1 0 6 ▁in ▁the ▁atmosphere ▁on ▁ 9 ▁October ▁ ▁The ▁Institute ▁of ▁Rad iop rote ction