[JURIST] Sweden opened up an investigation Thursday into allegations that the Central Intelligence Agency (CIA) [official website] may have landed planes containing terror suspects at Swedish airports several times since 2002. The investigation is one of many currently underway [JURIST report] in various European countries, including Iceland, Scotland, Spain, Romania, and Poland. The government has requested a complete investigation before December 8, but aviation agency officials expect to finish earlier. One of the suspected planes also landed at Oslo's main airport in Norway last July, and a US spokesperson told Norwegian officials yesterday that the plane did not contain terror detainees. The Danish government has revealed that CIA planes have violated Danish airspace 20 times since 2001, and landed within the country. Swedish Prime Minister Goeran Perrson [official profile] told reporters Thursday that if the investigation reveals evidence of US detainees on Swedish soil, "we will then address the question to the Americans ... about what they have transported in these planes." AFP has more.