Maoists on Monday blew up a railway track in Latehar, about an hour after the Rajdhani Express crossed the stretch, and bombed a mobile tower in neighbouring Palamu district during a 48-hour bandh called by them in five states, including Jharkhand.
Train services were disrupted between Barwadih-Barkakana route following the incident.
About 20 ultras blasted the track between Kumundi and Hehegarha railway stations, about 150 km from Ranchi, Latehar Railway station master PN Tiwari said in Latehar.
The blast occurred after the Rajdhani Express crossed the spot at 5:30 am. The blast took place around 6:30 am.
Latehar Superintendent of Police Kuldeep Diwedi said the blast was not targeted at any train.
In a separate incident in neighbouring Palamau, the Maoists blew up a mobile tower early this morning.
About 50 armed Naxalites reached the site of the tower situated on Aurangabad-Medininagar route in the district, stuffed explosives before blowing it up, Deputy Superintendent of Police Brajmohan Paswan, said in Latehar.
The blast left a big crater on the spot, about 200 km from Ranchi, he added.
The CPI (Maoist) have said in a release that they have enforced the two-day shut down in Jharkhand, Orissa, West Bengal, Bihar and Chhattisgarh following the arrest of two of its senior members a couple of days ago in Bihar.
The police, however, have not confirmed their arrest.