Dibrugarh, April 7 -- Union Minister for Ports, Shipping and Waterways Sarbananda Sonowal has slammed the Congress over its allegations against Assam Chief Minister Himanta Biswa Sarma and his wife and said that the opposition party "will have to face punishment for its dirty politics".

BJP leaders have launched a strong attack on Congress after its media department chairperson Pawan Khera made allegations against the Chief Minister and his wife on Sunday at a press conference in the national capital.

Himanta Biswa Sarma's wife Riniki Bhuyan Sharma has filed an FIR with Assam Police over the allegations, which came amid a hectic campaign for the assembly polls in the state scheduled for April 9.

Sonowal, a former Assam Chief Minister w...