The 2009 Assam serial blasts occurred on 6 April 2009 in the Maligaon and Dhekiajuli areas of the Assamese capital Guwahati on the eve of the Assamese Rajya Sabha MP and Indian Prime Minister Manmohan Singh's visit to address poll rallies.

Prime Minister Manmohan Singh was also scheduled to hold a poll rally in the district headquarters of Diphu, which itself was cancelled from the previous day due to unspecified reasons.

The blast also sparked a fire that set ablaze two cars and 20 motorcycles as it spread to a three-storey building housing the area police station.

Six were killed at the blast site, while one succumbed to injuries after jumping from an adjacent building which had caught fire.

Assam DGP J M Srivastav said that "this is the handiwork of ULFA boys ahead of the outfit's 'Raising Day,'" while adding that the militants used hi-tech explosives.