"We had gone to Panighata to attend a programme but GJM activists, armed with khukri (Nepalese knife) assembled there and hurled stones at us", he alleged.
Deb had gone to Panighata to attend the birth anniversary of Nepali poet Bhanubhakta Acharya.
The GJM workers also damaged a police vehicle there, the minister charged and added that this was not a movement but vandalism and "the Centre is giving them support".
"We are launching movement in a democratic way. The only solution is Gorkhaland and the Centre should open a dilogue on it", he said.