NEW DELHI, Dec. 27 (Xinhua) -- Five people were killed and four others injured in a blast staged by suspected separatists in the eastern Indian state of West Bengal Thursday evening, said local media.
Suspected militants of a group called "Kamtapur Liberation Organization (KLO)" triggered the bomb blast kept on a cycle in Jalpaiguri district of northern West Bengal, said Indo-Asia News Service.
Police said the attack was apparently in retaliation of the arrest of some KLO activists and also coincided the anniversary of founding of the group, said the news service.
Police issued a high alert across north West Bengal after the blast took place and a bomb disposal squad has been sent to the area from Darjeeling, an administrative center of northern West Bengal.
India's northeast region and its surrounding areas have dozens of separatist groups who stage blasts, kidnapping and murders from time to time.