The Khammam rural police unravelled the mystery shrouding the triple murder of A Venkanna, (58), a hotel owner, and his wife and younger daughter by arresting Bukya Vinay, (23), the son-in-law of the former, here on Thursday.

A police team nabbed Vinay near Nayabazar area in the town on Thursday morning. The police also recovered an axe and knife from the accused.

The rural CI P. Naresh Reddy told newsmen that Vinay, husband of the elder daughter of Venkanna, nursed a grudge against the latter owing to family feuds and financial disputes.

Vinay allegedly axed Venkanna, the latter's wife Sridevi, (49), and younger daughter Sravani, (18), to death while they were fast asleep at their road side hotel near Edhulapuram in the rural mandal a week ago.