The central teams have been visiting hospitals and quarantine centres and meeting officials in Kolkata and Siliguri.
"As expected, IMCT's visit to #Bengal has served no purpose. Visiting districts with no hotspots, asking #Bengal for audit committee, already been in place since early April," TMCs leader in the Rajya Sabha Derek OBrien said in a tweet.
"Their real aim is to spread the political virus. They are doing it shamelessly, Blatantly. Take your pick, IMCT = India's Most Callous Team IMCT = I Must Cause Trouble (in Bengal)," he tweeted.
On the other hand, the two central teams have alleged non-cooperation from the West Bengal government over providing logistical support and other relevant information.