Prime Minister Manmohan Singh on Thursday paid a solemn tribute to soldiers who have sacrificed their lives for the nation by laying a wreath at the Amar Jawan Jyoti at India Gate.

Prior to the start of the 63rd Republic Day parade showcasing India's military might and cultural diversity, Manmohan Singh drove to the memorial to the unknown soldier -- marked starkly by a reversed rifle, standing on its barrel and crested with a soldier's helmet.

After the prime minister laid the floral wreath, the guard commander gave salute and buglers played the "Last Post" -- rendered at military funerals and ceremonies commemorating those who have died in war.

Along with everyone, Manmohan Singh observed a two-minute silence.