Accordingly, in the morning of 11 September 1967, the engineers and jawans (soldiers) of Indian Army started laying the stretch of fencing from Nathu La to Sebu La along the perceived border. According to an Indian account, immediately a Chinese Political Commissar, with a section of Infantry, came to the centre of the pass where an Indian Lieutenant Colonel was standing with his commando platoon. The Chinese Commissar asked the Indian Colonel to stop laying the wire. Indian soldiers refused to halt, saying they were given orders. An argument started which soon turned into a scuffle. After that, the Chinese went back to their bunkers and the Indians resumed laying the wire.