The situation on the Tuvan stretch of the Russian-Mongolian border has got tenser due to the recent accident with the gun-fires. Two Mongolian frontier-guards have surpassed the state border and gone deep into the territory of the neighbouring republic to meet Tuvan hay-harvesters there. Their accidental meeting ended in gun-firing. One of the Mongolian frontier guards got wounded and died on the way to the hospital. The other one was arrested. The investigation of the case has started.