The CBI also conducted searches at the Rajya Sabha Secretariat, his residence in Muzaffarpur, Bihar and his office in New Delhi.
Sahani had allegedly siphoned off around Rs 9.5 lakh by presenting fake air tickets and boarding passes.
This is the first FIR in the LTC scam against a Rajya Sabha member after the CBI rejistered a preliminary enquiry in the matter in August this year.
Sahani allegedly made fraudulent LTC claims using fake tickets and boarding passes. Sources in the CBI said that a case has been registered under the Prevention of Corruption Act and sections of the Indian Penal Code.
Sahani had allegedly siphoned off around Rs 9.5 lakh in the scam
The CBI also named an Air India employee, Rubaina Akhtar and New Delhi based Air Cruise Travels Private Limited also in the FIR.
At present, the CBI is probing nine MPs for making LTC claims based on fake travel documents. A deeper probe in future would also involve government officials, airline staff and travel agents.