Myanmar's pro-democracy leader Aung San Suu Kyi appeared to remain under house arrest following today’s expiration of a previous detention order, with police paying her a brief visit and government security around her home tightened. Officials from the country’s secretive military regime could not be reached to confirm the action, and a spokesman for Suu Kyi’s National League for Democracy party said he had no news of a change in her status. Spokesman U Lwin said he had not received any news of the order, nor had he heard from Suu Kyi, who is under virtual solitary cofinement at her residence in the Myanmar capital, allowed no outside visitors and no telephone contact. U. Lwi, who himself has been under house arrest three times in the past, noted that today was the day when a previous one-year detention order would expire. ‘‘.According to the procedure, if there is an extension, today would be the day,’’ he said.