Border passes must remain closed to timber imports as long as logging remains a threat to our forests, Banharn Silpa-archa said yesterday. The Chart Thai leader said he had reaffirmed his stance to Pongpol Adireksarn, the agriculture minister, who was considering a petition lodged by four logging companies. Boonsawat Duangjai-ek, managing director of B&F Goodrich, quoted Burmese authorities as saying they would not do business with Thai firms again.The governor of Mae Hong Son has voiced support for the logging companies, which have threatened to sue the government for 200 million baht for losses caused by the closure.