Union minister Thomas, contesting from the Ernakulam constituency here, filed three sets of papers before Returning Officer M G Rajamanickam this morning.
State Minister Ibrahim Kunju, V J Paulose, DCC President, Benny Behanan, MLA, accompanied Thomas.
Socialist Janata (Democratic) state president Veerendra Kumar filed his nomination papers for Palakkad constituency.
BJP candidate A N Radhakrishnan, who is contesting from Ernakulam, also filed his nomination.