Governors of the all the states hoisted the national flag and extended greetings to the people.
Suspected ULFA (Independent) insurgents triggered the three blasts in Assam's Tinsukia district, the police said, adding that there was no report of any casualty.
Besides, an indefinite curfew was on at Maibang area in Dima Hasao district where two persons who were injured in yesterday's violence succumbed to injuries.
The Republic Day function in Dima Hasao district headquarters town Haflong was also cut short with hoisting of the tricolour only.
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In neighbouring Meghalaya, Governor Ganga Prasad in Shillong said that the state has evolved as one of the most preferred tourists destinations in the North East.
Nagaland Governor P B Acharya expressed hope that the decades old Naga political issue would be resolved soon.
In Imphal, Manipur Governor Najma Heptulla awarded medals to police and fire brigade personnel for their services.
On this occasion, Sikkim Governor N. Sriniwas Patil paid homage to the martyrs who laid down their lives for India's freedom.
In Kolkata, West Bengal Governor K N Tripathi presided over an hour-long march past of the armed forces, police forces and civilians.
The 'unity in brotherhood' tableau from the state, which was rejected by the Centre for this Republic Day procession, was also included in the parade.
In Patna, Bihar Governor Satya Pal Malik said the state is working for the development of all sections of the society.
In Odisha, Chief Minister Naveen Patnaik asserted that the state's growth rate has surpassed the national average, while in Ranchi, Jharkhand Governor Droupadi Murmu said the state is at the second spot after Gujarat in the growth rate in the country.