Born in Sweden to Estonian refugees, he was raised in New Jersey and graduated from Columbia University.
Language rights have been a persistent flashpoint, since state employees are required to speak Estonian.
In Estonia, Prince Harry will thank the Estonian Defence Forces for their support of British troops in Afghanistan.
A criminal investigation has begun and the Estonian Ministry of Foreign Affairs has summoned Russian Ambassador Yuri Merzlyakov.
The Estonian statement implied the alleged abduction is an intentional slap in the face to the Americans.
Rõivas called the kidnapping of a counterintelligence official a serious crime “unacceptable to any Estonian.”