VILNIUS—Lithuania is working to confirm the identities of the passengers who disembarked from a diverted Ryanair plane after it was forced to land in Belarus, the chief of Lithuania’s criminal police said on Friday. Dissident Belarusian journalist Roman Protasevich, 26, and his girlfriend Sofia Sapega, 23, were arrested when the plane landed. But three other people also disembarked. Irish Foreign Minister Simon Coveney has said it seems likely they were secret police. Also on Friday, Lithuania’s foreign ministry said in a statement that it is expelling two Belarusian diplomats, saying their activities were “incompatible with diplomatic status.” “With this decision, Lithuania also stands in solidarity with Latvia, whose diplomats and employees at the embassy in Minsk were unjustifiably expelled by Belarus a few days ago,” the statement said. Belarus television aired interviews with three people on Wednesday who it said were the passengers in question. One named as Iason Zisis, said …