A court in the Czech capital Prague has begun hearing a 50-year-old Cold War murder case in which the wife of a senior French politician was killed.
Cold War ghosts still return to haunt the Czech Republic
The hearing was adjourned soon after it opened, so that the judge could decide whether the two elderly suspects were fit to stand trial.
Two former agents of the communist-era secret police are accused of sending a parcel bomb disguised as a cigar box.
It killed the wife of Strasbourg Prefect Andre Tremeaud.
Prosecutors say the Soviet KGB got the two Czechoslovak agents to send the bomb in 1957.
Mr Tremeaud - the intended target - was working for the EU's earliest precursor, the European Coal and Steel Community.
According to prosecutors, the KGB hoped that by killing him and blaming neo-Nazis, they could destroy the Franco-German rapprochement driving the fledgling European integration.
Only one of the elderly defendants - Milan Michel - turned up in court on Monday.
The other, Stanislav Tomes, excused himself on grounds of ill-health.
The BBC's Rob Cameron in Prague says the case is the result of 10 years of evidence-gathering by a body set up to investigate Communist crimes.
Few Czechs expect the defendants to go to prison if found guilty, he says.