Pakistan Prime Minister Imran Khan has ordered a probe into the matter.
Sonia claimed that the Congress was the only one party that followed the path shown by him and carried on his legacy.
Former Deputy Chief Minister Sushil Kumar Modi, Leader of the Opposition in state Assembly Nand Kishore Yadav and state party President Mangal Pandey and several party workers were detained when they tried to stop trains at Sachivalya halt in Patna town, police said.
