Two unidentified men allegedly molested a woman security guard of the Central Railway on a goods train at Kalyan station in Thane district of Maharashtra, police said Friday. A case under IPC section 354 (molestation) has been registered and police were searching for the culprits, an official said. The complainant was posted as a security guard on a goods train. When the train was in the railway yard at Kalyan late Thursday evening, two men entered its brake-van and molested her, the official said. Kalyan Railway Police are conducting further probe.