The railways has deployed 20 additional companies of the RPSF across the country, especially in Punjab, Haryana, Uttar Pradesh and West Bengal.
Farmers staged demonstrations on tracks at several places. They stopped a train in Jaipur and climbed on its engine.
According to a senior police officer, the trains scheduled to arrive at Narela were stopped by the protesting farmers in Haryana's Sonepat.
The Delhi Metro Rail Corporation tweeted on Thursday to inform the closure of entry and exit at these four stations.
Different farmers' bodies had stepped up their agitation by resorting to blocking rail tracks for an indefinite period from October 1 in the state to protest the new farm legislations.
The 'rail roko' agitation had started on Thursday, forcing the railway authorities to suspend the operation of special passenger trains in the state.