A red alert has been sounded in the city in the wake of serial blasts that rocked Mumbai on Wednesday.
Police forces have been deployed in sensitive areas and security beefed up at railway and bus stations.
Frisking operations have been intensified at all major junctions in the twin cities. Suspects are being rounded up to prevent any untoward incident. A constant vigil is being maintained on the movement of strangers at all the three railway stations at Secunderabad.