Since last year's inauguration of conservative South Korean President Lee Myung-bak who North Korea calls a "traitor" North Korea has restricted access to the zone, detained a South Korean executive for more than two months without trial, and cancelled all of the contracts governing rent and wages.

VOA: standard.2009.06.05

Miklos Suth, Hungary's chief vet, dismisses the idea, pointing out that the poultry came from outside the restricted zone.

ECONOMIST: Avian flu

Home Secretary David Blunkett and Transport Secretary Stephen Byers have demanded an urgent report into how robbers accessed the restricted zone amid heightened security since 11 September.

BBC: Inquiry launched into Heathrow heist

He said that, once airborne, pilots would have to leave the restricted zone, which would take about 25 minutes, rendering it pointless for short helicopter flights or one-hour flying lessons.

BBC: Redhill airfield