Acting on a tip-off, the STF of the West Bengal Police made the arrests on Wednesday from Shasan, around 30 km from Kolkata.
Cases have been booked against them under relevant sections of IPC and the Explosives Act.
The company manufactures "industrial-commercial explosive materials" and was established in 1941, according to its website.
The accused has been identified as Prem Sagar Meher of Tukla village under Khariar police limits in Nuapada district.
Chief Minister Pinarayi Vijayan last week wrote to the prime minister requesting 1,000 tonnes of liquid oxygen supply to meet the state's demand.
The basic issue of who placed the explosives-laden vehicle and on whose instructions it was done needs to be found out, the Maharashtra Navnirman Sena chief said.
Ambani bomb scare: Jaish-ul-Hind's Telegram channel 'created in Tihar'; police approaches jail admin
Mumbai Police took the help of a private cyber agency to track the location of the phone on which the Telegram channel was created, the official said.
A woman passenger, a native of Chennai, was taken into custody in connection with the incident.
Principal Secy says workers at firecrackers units must be certified
Officials said that a combination of excess workforce along with illegal sub-leasing had contributed to the district’s worst cracker mishap in nearly a decade.
The explosion took place outdoors at the Nitroerg plant in the town of Bierun, firefighters' spokeswoman Aneta Golebiowska said.
A joint search operation by police and Rashtriya Rifles of the Army is underway after the whole area was cordoned off to nab him, the SSP said.
Maharashtra ATS nabs Sanatan Sanstha member, large quantities of explosives found; opposition demands ban
Vaibhav Raut a member of "Hindu Govansh Raksha Samiti", was apprehended by the ATS Nallasopara West late last night and large quantities of explosive were seized from his house.