At least eight persons were injured, two of them seriously, in the blast in Bhopal-Ujjain passenger train near Jabdi station in Shajapur.
Chouhan has asked state Director General of Police, forensic experts, and officials of the Special Task Force and Anti-Terrorism Squad to inquire into the blast, an officer from the Public Relations department said.
The state government also announced a financial assistance of Rs 50,000 each to the seriously injured persons and Rs 25,000 each to the other injured passengers.
The two seriously injured persons were referred to a hospital in Bhopal. The others were undergoing treatment at a hospital in Kalapipal town, which is close to the accident site.