An Egyptian military court notorious for its harsh verdicts convicted Tuesday 25 key members of the opposition Muslim Brotherhood and sentenced them to up to 10 years in jail, a security official said. The charges against members of Egypt's largest opposition group included money laundering and terrorism, but it was not immediately clear if the 25 were found guilty of both offenses, according to the official. Amnesty International called Tuesday's sentences "a perversion of justice" and demanded the men be released and retried in a civilian court. "Today's sentences leave little doubt that the Egyptian authorities are determined to undermine what has become the main opposition group in the country," the London-based human rights group said in a statement. Trying civilians before military courts, it said, "flouts international standards of fair trial and is inherently unjust."