"We have taken into custody Narendra and Phoolchand, two brothers of the main accused Rajendra Kasawa and handed them over to Jhabua Police," a police official told PTI on the condition of anonymity.
Jhabua Superintendent of Police, G G Pandey, however, refused to give any further information about the development stating that the matter was under investigation.
After taking the duo into custody, police hope to get definitive clues about the main accused Rajendra Kasawa, who is absconding since the explosion on Saturday.
Meanwhile, a top official associated with the probe said, Kasawa's mobile phone was functioning till Saturday afternoon (even after the explosion) and his family members had been contacted using that phone.
However, police said it was not clear who used that mobile phone.
The official also said that a close relative of Kasawa was taken into custody from Indore's Lodhipura area and was questioned in connection with the case.