DUSHANBE -- Taleban militia opened fire on Russian troops guarding the Tajik-Afghan frontier, and launched two artillery shells into Tajik territory from positions across the Pyandzh River, a border guard spokesman said Wednesday. Taleban fighters attacked the border post at Kupletin, some 260 kilometres (160 miles) southwest of Dushanbe, with automatic gunfire late Tuesday but did not kill or wound anybody, the spokesman said. The Russian troops did not return fire. The Taleban launched the attack from positions only 400 meters (yards) away, on the other side of the Pyandzh River which forms a natural frontier between Tajikistan and Afghanistan.