The first Shramik Special train arrived at Dhubri railway station in Lower Assam from Agartala at around 6.30 pm on Monday.
A total of 366 passengers, who remained stranded in Tripura due to lockdown in view of the COVID19 pandemic, were brought back by the train.
The health officials conducted thermal screening of the passengers after the arrival of the train at Dhubri railway station under tight security.
Later, all the passengers including children and elderly persons, were kept in a mass quarantine facility located at Inland Waterways Authority of India River Port in Panchughat area of Dhubri town.
Additional deputy commissioner (health) Dhubri Ankur Bharali and additional superintendent of police H Barman were present at the railway station during the arrival of the train.
Meanwhile, Dhubri health officials said as many as 12,507 persons, who have come from different parts of the country to the district, are staying in 118 mass quarantine facilities across the district.
And, out of these returnees, 839 people have been quarantined on Monday till filing of this report.