The officials declined to enumerate the questions but said they went to the case against each detainee that Europe might be asked to accept. They also sought assurances that the policies underlying the system of detention in Guantanamo are a thing of the past.
"We have a list of questions, not conditions," said Ivan Langer, the Czech interior minister whose country currently holds the presidency of the European Union. He added at a news conference Monday in Washington, "There is one condition: maximum information."
Accompanying Langer was Jacques Barrot, a vice president of the European Commission. The visit was the first formal senior contact between the European Union and the Obama administration.
Langer said the decision of whether to accept detainees is one for individual states within the union, but because of open borders in continental Europe, officials there would like an agreed framework among the member states in advance of any transfers from Guantanamo.