A newly-married man and his grandmother were killed and the wife of the man was critically injured when a gift packet the couple had received exploded at Patnagarh in Bolangir district on February 23.
Though the police has so far not been able to arrest anyone in this connection, Sharma said two special police teams led by Bolangir SP are working on the case.
One team is conducting investigation at Raipur in neighbouring Chhattishgarh from where the gift packet came, while the other team is probing the case in Odisha, he said.
Sharma said the police are waiting to record the statement of the injured woman.
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The gift parcel reached the residence of Soumya Sekhar Sahu, the newly-married man who died in the incident, at around 12.30 pm on Friday, just five days after he tied the knot with Reema.
While unwrapping the gift parcel, it exploded killing the groom's grandmother Jemamani on the spot and seriously wounding the newlywed couple Soumya Sekhar and Reema.
Soumya Sekhar died later at a hospital in Rourkela while Reema is admitted at the SCB Medical College Hospital in Cuttack, with 35 per cent burn injuries.
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