Bombs have ripped through crowded markets in a coordinated attack in India's volatile northeast, killing at least 61 people and wounding more than 300, the Associated Press reported.
The scale and planning behind Thursday's 13 blasts surprised authorities, who struggled to determine who was behind the attacks - among the worst in a region plagued by separatism, ethnic violence and Islamic militants.
Subhash Das, a senior official in the state's Home Ministry, said 61 people were killed, including at least 31 who died in five explosions in the state capital.
He said some 300 people were wounded by the bombs that went off within minutes of each other just before noon.
Officials blamed the largest separatist group, the United Liberation Front of Asom, for the blasts.