Mark colour of boxes being transported: Mamata

West Bengal Chief Minister Mamata Banerjee Tuesday asked the people to keep vigil about transportation of boxes of various colours, in an oblique reference to allegations of a black trunk having been offloaded from the prime minister's helicopter in Karnataka.

Speaking at two rallies in Balurghat constituency, Banerjee attacked the RSS saying that it has imbibed the "shopping mall culture".

"I urge the public to keep their eyes and ears open as during elections boxes of various colours - red, blue and other colours - are coming," Banerjee said without naming anyone.

The Congress had on Sunday demanded a probe into the alleged transportation of a "suspicious black trunk" in Prime Minister Narendra Modi's helicopter during his visit to Chitradurga in Karnataka for poll campaign.

Modi had addressed an election rally in Chitradurga on April 9.

The party also played a video clip purportedly showing that the trunk, after being unloaded from the PM's helicopter, was carried to a private car that, it alleged, was not a part of the SPG carcade and was taken away.

Taking on the RSS, the Trinamool Congress supremo said, "Those who used to wear khaki shorts have now imbibed the shopping mall culture."