A police official said on Thursday that three people, including a juvenile, were detained in connection with the blast on the Udaipur-Ahmedabad railway track.
After Indian Railways and Hindustan Zinc Limited acquired their land, the accused were upset because they were not offered compensation or jobs.
ADG Ashok Rathore of the Anti-Terrorist Squad (ATS) and Special Operation Group (SOG) said that three people, including a juvenile, were detained. Another person from whom the explosive was purchased was also arrested.
Dhool Chand Meena and Prakash Meena have been identified as the accused. A 17-year-old juvenile is involved in the case. In addition, Ankush Suvalka is also accused, he said, of selling the explosives.