South Eastern Railway sources said the Duranto Express left Tatanagar station at around 7:55 am and was expected to reach Howrah by 11 am.
All other halted trains, including Howrah-Tatanagar Steel Express and the Up and Down Tatanagar-Kharagpur passenger trains have also resumed their onward journey at around 8 a.m. after being halted at Kalaikunda last night, the sources said.
The trains were halted at Tatanagar, Kharagpur, Kalaikunda and other important stations after the Jhargram GRP alerted authorities last evening about a possible attack by the Maoists on Duranto.
Duronto, which was at Ghatsila station, was immediately surrounded by gun-toting security personnel and passengers asked to switch off lights and lower shutters. The train was later taken to Tatanagar.
According to the Jhargram GRP, a group of armed people had gathered at Jamui Bhadui, a known Maoist stronghold, near the Khatkhura halt station just an hour before the Duronto was to pass.
The GRP apprehended trouble and immediately alerted the authorities in Kharagpur and Tatanagar.
A year ago the Maoists had detained a train at Kalimouli near Ghatsila station.
After the May 28 Jnaneswari Express disaster which left 148 passengers dead, trains are not allowed to run between 10:00 pm to 5:00 am in the Kharagpur-Tatanagar and Kharagpur-Adra sections till June 14.