A wealthy businessman in the Irkutsk town of Taishet has been arrested for murdering a local philanthropist with a grenade he'd allegedly sent to her disguised as a New Year's gift.

The husband of the victim, 43-year-old Beruta Ivanova, found the present, a tin candy box with a card attached identifying its senders as orphans whom Ivanova had earlier helped, in a bag outside the door to the couple's apartment.

When the woman brought the box into another room and opened it, the grenade exploded, the Irkutsk region Investigative Committee said Monday in a statement. Ivanova succumbed to her injuries in a hospital 10 days later, on the morning of Jan. 11.

The grenade, its pin removed and set to detonate, was hidden inside a festively decorated mitten within the box, Life News reported.

The suspect, Oleg Safarov, 34, is believed to have sent the bomb because of a personal quarrel with the victim. He was arrested upon returning home from a trip to India. Life News identified him as one of the richest men in Taishet.

Safarov admitted to investigators that the grenade was given to him by a friend, but he maintains that he believed it to be a dud. Investigators say, however, that the device was too elaborately rigged to corroborate that story, BaltInfo reported.