Police in Gulmi district on Thursday afternoon arrested a man on the charge of having unnatural intercourse with a four-year-old boy from Chandrakot Rural Municipality.

The arrested has been revealed as the grandfather of the victim.

The 45-year-old accused allegedly had unnatural coitus with the minor when there was nobody at home. Acting on a tip-off, security personnel deployed from the Chandrakot-based Area Police Office nabbed the accused.

Further investigation into the case is underway, informed the police.