CNN London | European countries shut their airspace one after the other Thursday as a cloud of volcanic ash wafted over from Iceland and posed a danger to flights.
Airspace over the United Kingdom was due to be closed for six hours from midday but air authorities later extended the closure until at least 7 a.m. BST (2 a.m. EST) Friday.
Ireland, Sweden, Norway, Belgium, Denmark and the Netherlands also announced the closure of their airspace, authorities in each country said.
Norway also closed its ocean territory and canceled helicopter flights to off-shore oil installations, according to Avinor, the Norwegian agency responsible for the Norwegian airport network.
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