FACTBOX: Wiesenthal Center's top 10 WW2 war criminals

(Reuters) - Accused Nazi death camp guard John Demjanjuk goes on trial in Munich on Monday to face charges he participated in the killing of 27,900 Jews in 1943.

Demjanjuk is number one on a list of 10 most-wanted war criminals compiled by the Simon Wiesenthal Center, according to a statement issued in April 2009. Here are details of the 10 accused and two further people accused but thought likely to be dead (*).

* ALOIS BRUNNER -- Right-hand man to the Gestapo’s “technician of death” Adolf Eichmann, he helped organize deportations of Jews to death camps and would probably top the Center’s list of most-wanted Nazi criminals if it did not think the chances of his still being alive to be slim.

* ARIBERT HEIM -- Heim killed hundreds at the Mauthausen concentration camp in Austria with injections of poison and removed organs from victims without anesthetic. Various media reported in February that he died in Cairo in 1992, aged 78. However the Center says that without conclusive forensic proof of his death, it is still not possible to close his case.

1. IVAN (JOHN) DEMJANJUK -- Accused in 1977 of being the infamous “Ivan the Terrible,” a Treblinka extermination camp guard, he was extradited to Israel and sentenced to death, then freed on subsequent evidence.

Returning to the United States in 1993, his citizenship was revoked in 2002 after a U.S. court convicted him of working at three other camps. German prosecutors suspect him of helping in the deaths of 27,900 Jews at the Sobibor death camp. He was extradited to Germany in May 2009.

2. DR. SANDOR KEPIRO -- Serbia’s war crimes prosecutor in 2008 requested an investigation into the Hungarian suspected of committing genocide against Jews and Serbs in World War Two.

Prosecutors said Kepiro is suspected of taking part in a raid by Hungarian forces in January 1942 in northern Serbia “when, in an attempt to destroy members of the Jewish and Serbian national groups, they killed at least 2,000 of them.”

Sentenced to 10 years in jail in 1944; that verdict, and his acquittal later the same year came when Hungary was under fascist rule and an ally of Nazi Germany. In 2007 a Hungarian court ruled he could not be investigated as his murder conviction had been overturned.

But the Budapest Chief Prosecutor’s Office reported that 95-year-old Kepiro was questioned in September about allegedly relaying orders to militia members under his command who killed four civilians in Novi Sad, Serbia, in 1942.

3. MILIVOJ ASNER -- Alleged to have been a senior security official during the 1941-45 rule of Croatia’s pro-Nazi Ustasha regime, Asner says he ordered wartime deportations of Jews and Serbs to their homelands, not to death camps in Croatia.

Asner moved to Austria when a Nazi-tracking group found him living in Croatia in 2005. Austria previously rejected a Croatian extradition request on grounds that Asner’s physical and mental condition was fragile.

4. SOEREN KAM -- The Danish-born former SS member is accused of helping Nazi forces in Denmark and of the 1943 murder of anti-Nazi Danish journalist Carl Henrik Clemmensen in Copenhagen.

Kam fled to Germany after the war, obtaining German citizenship in 1956. Following his 2006 arrest, a German court delayed a decision on his extradition to Denmark.

5. KLAAS CARL FABER -- Accused of serving in the German Security Service in Holland, he was sentenced to death in Holland for murders of prisoners of Westerbork transit camp and Groningen prison in 1944; the sentence was commuted to life imprisonment in 1948. He escaped from prison to Germany in 1952.

6. HEINRICH BOERE -- Accused of killing three Dutch civilians in 1944 as a member of an SS hit squad that targeted anti-Nazi resistance fighters, Boere confessed after being captured by U.S. forces.

Escaping to Germany, he was sentenced to death in absentia in Holland in 1949. After refusing a 1980 Dutch extradition request, a German court indicted him in April 2008.

Boere went on trial in Aachen on Oct 31, 2009.

7. KAROLY ZENTAI -- Zentai is accused of killing Jewish teenager Peter Balazs in Budapest. At the time Zentai was a 23-year-old warrant officer in the pro-Nazi Hungarian military, but argues he left Budapest with his regiment the day before the murder in November 1944. Zentai is also accused of taking part in “manhunts, persecution, deportation and murder of Jews.

He emigrated to Australia in the early 1950s and was arrested by Federal Police in July 2005. An Australia court ruled last month that he was eligible for extradition to Hungary and the government approved the extradition on November 12. However Zentai’s son, Ernie Steiner, said his father would seek a judicial review of the court decision.

8. MIKHAIL GORSHKOW -- Alleged to have been an interrogator for the Gestapo, he is accused of helping kill about 3,000 men, women and children in the Slutsk ghetto in Minsk, Belarus. Estonian-born Gorshkow became a U.S. citizen in 1953 but was denaturalized in 2002 and is under investigation in Estonia.

9. ALGIMANTAS DAILIDE -- Dailide volunteered for Lithuania’s Nazi-backed secret police, the Saugumas, but said he was only a humble clerk. Entering the United States in 1950, he worked as a real estate agent. In March 2006 Lithuania convicted the then 86-year-old of handing over Jews attempting to flee from the Vilnius ghetto. They were subsequently murdered. A Lithuanian court sentenced him to five years in jail, but suspended his sentence due to his health.

10. HARRY MANNIL -- The Caracas-based auto sales millionaire and member of Venezuelan high society is accused of arresting Jews and communists who were later executed by the Nazis while serving in Estonia’s political police force during the Nazi occupation. Cleared of the accusations by Estonia, he remains on a U.S. watch list barring him from entering the United States.