A spokesman for the Northeast Frontier Railway, Nripen Bhattacharya, said here that three special trains had left for Bangalore yesterday taking back those who had left.
He, however, could not give the exact number of people returning to Bangalore.
Government officials said it would take two to three days before all of them returned to the Karnataka capital and other cities.
"Today we also ran a special train from Kamakhya station in Guwahati to Dibrugarh for those passengers who are from upper Assam. The train left at 12.45 pm," Bhattacharya said.
The Kamakhya-Dibrugarh special was for those who reached Guwahati from Bangalore and other places in two special trains this morning and had to go to upper Assam as part of their onward journey.
Special train services have been suspended from Bangalore by the South Western Railway on Saturday.