Railway Police were put on alert on Friday after authorities received an anonymous letter saying bombs had been planted on several trains running between Jaipur and Agra.
"The divisional railway manager's office received an anonymous letter saying that the bombs, including a 'human bomb', were planted on trains running between Jaipur and Agra and they were set to blow up anytime today," Rohit Mahajan, superintendent of railway police (GRP), told IANS.
Passengers are being frisked while a thorough check of coaches is underway with the help of a dog squad, police said. A bomb disposal squad is also helping the police.
Mahajan said though the letter appears to be a hoax police are not taking any chances.
Trains are running on schedule.