Myanmar's military government rejected UN suggestions for political reform Friday in a meeting with a visiting special envoy, state radio and television reported. Information Minister Brig. Gen. Kyaw Hsan, who met with UN special envoy Ibrahim Gambari, said it was "impossible" to revise a government-drafted constitution that will be submitted to a national referendum in May, the evening news reported. He also said the government had done enough to hold a dialogue with detained pro-democracy leader Aung San Suu Kyi, head of the opposition National League for Democracy party. Gambari arrived Thursday on his third trip to Myanmar since the junta's deadly crackdown on anti-government protesters in September sparked a global outcry.