KINSHASA, Congo (AP) - A leader of the M23 rebel group in eastern Congo says his movement is ending its rebellion after more than a year and a half of fighting against the Congolese government. In a statement released early Tuesday, M23 President Bertrand Bisimwa said the group would seek to resolve its grievances through "political means only." The announcement came as the Congolese military declared victory over the rebels, having seized control of the last two hills that had been held by M23. Peace talks between the two sides have repeatedly stalled since December, and the Congolese military stepped up its offensive last month against the rebels. Analysts have cautioned, though, that M23 was only the latest reincarnation of discontent in the region and that other groups could emerge from its demise.