"We have intensified our vigil and have enhanced manpower at Delhi Metro stations.
"At certain stations that border or fall in neighbouring Haryana and Uttar Pradesh, the security drills and frisking have been enhanced," CISF Director General (DG) O P Singh told PTI.
He said the force has also "intensified" patrolling by its quick reaction teams (QRTs) in the metro network in order to thwart any untoward activity.
The DG added the frisking of passengers has been intensified at few stations.
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A senior official of the Central Industrial Security Force (CISF) said all the unit commanders of the Delhi metro security wing have been asked to be on the ground by the DG.
CISF Deputy Inspector General (Metro security) Raghubir Lal is himself camping at the Anand Vihar metro station where few train coaches, stationed in the neighbouring Anand Vihar railway station, were set afire by miscreants, the official said.
Ram Rahim Singh's conviction by a Panchkula court had triggered widespread violence and arson by his supporters in Punjab and Haryana, with few incidents being reported from the national capital too.