Madhya Pradesh Police on Wednesday arrested one person from the Badnawar of the state's Dhar District for allegedly providing explosives to Rajendra Kasawa, the main accused in the explosion which took place in the Petlawad area of Jhabua District on Saturday.
The arrested person has been identified as Dharmendra Rathore.
Earlier, Kasawa's wife, son and daughter were released by the police after being interrogated in connection with the Jhabua blast incident.
Explosives were found in a godown owned by Kasawa, who is absconding since the explosion.
The Government of Madhya Pradesh has appointed a one-member commission to probe the Petlawad incident.
At least 89 people were killed and nearly 100 injured in the explosion.