Kolkata (PTI): Two persons were killed and seven others injured in a bomb explosion in Chitpur area in north Kolkata on Sunday, police said.

The blast occurred at Sarbamangala Ghat when some rag pickers were rummaging through the garbage for plastic bags, they said, adding the bomb was hidden under the heap of garbage.

The injured were rushed to nearby hospital.

Primary investigations by the North Port police under which the area falls, revealed that the bombs were crude in nature.