The police have intensified the probe into the Tingrai Bazaar grenade blast case. 

The police have arrested a second suspect in connection with the case. 

The arrested person has been identified as Hiren Gogoi. 

Hiren Gogoi has been arrested from his residence at Lakhipather in Tinsukia district. 

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Hiren Gogoi has been arrested on grounds that his motorcycle has been found identical to the one used by the miscreants in the Tingrai Bazaar grenade blast case. 

According to security agencies, Hiren Gogoi was earlier involved in acts like extortions. 

Hiren Gogoi has been taken to Tinsukia for further interrogation. 

Earlier, the police had arrested one person in connection with the case.  

The arrested person was identified as Dipen Saikia.  

Dipen Saikia was arrested by police from Tamuli Bongaon in Digboi for his alleged involvement in the grenade blast at Tingrai Bazaar in Digboi on Friday. 

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Two persons were killed and two others injured in a grenade blast in the market area of Tingrai under Digboi police station in Tinsukia on Friday.  

The deceased were identified as 25-year-old Sanjit Singh and 22-year-old Surajit Talukdar, both residents of Tingrai area.