Myanmar's pro-democracy leader Aung San Suu Kyi was taken by armed escort Thursday to a prison compound where she will be tried in connection with the intrusion of an American man who sneaked into her compound, her lawyer said. Such a trial could justify another extension of Suu Kyi's yearslong detention, which officially ends May 27. In the past the junta - which regards the Nobel Peace laureate as the biggest threat to their rule - has found reasons to extend her periods of house arrest, which international jurors say is illegal even under Myanmar's own law. An American man, John William Yettaw, was arrested last week for allegedly swimming a lake to secretly enter Suu Kyi's home and stay there for two days. His motives remain unclear. Earlier Thursday, a motorcade accompanied by armed police, drove Suu Kyi and two women who live with her from their lakeside villa to Insein Prison. They were escorted into the closely guarded prison through a side gate.