Thick cloud coming from an erupting volcano in Iceland has covered some parts of the UK, Scotland up to northern England Tuesday, disrupting air traffic and leaving thousands of passengers stranded in several airports.

In Germany, air traffic control officials said they would close airports at Bremen and Hamburm from 5am and 6am, and warned that would close Berlin airport too if the situation needs to.

Ryanair issued a warning to customers awaiting flights from Germany that their travel may be disrupted. The carrier said it cancelled all flights to and from Bremen, Lubeck and Magdeburg airports until 2pm local German time.

Chaos was the order of the day as hundreds of flights across the UK were cancelled due to concerns coming from the ash cloud.

But before the situation improves, volcanologists and weather forecasters warned that the cloud is heading over the northern territories which could force more flight cancellations and more miseries for travelers to and from Europe.

Other carriers like Easyjet has advised passengers traveling from Edinburgh, Glasgow, Newcastle, Amsterdam, Dortmund, Berlin, Copenhagen or Hamburg to call their office first before going to the airport and check if their flights are not cancelled.

British Airways has cancelled two flights from Hamburg.

On Tuesday, flights from Glasgow and Edinburgh International airports, as well as Dundee, were cancelled, with severe disruptions hitting other Scottish airports. The Newcaslte International airport was the hardest hit of the ash cloud.