You'll never believe what these parents did to their children

A couple injected their three young children with heroin, telling them it was "feel-good medicine" to help them sleep, police in the US have reported.

Ashlee Hutt, 24, and Leroy McIver, 25, allegedly drugged their six-year-old son, and daughters, four and two.

According to a probable cause affidavit, the six-year-old told investigators "his mum and dad gave him and his sisters the 'feel -good medicine' which "he described as a white powder which was mixed with water". The boy said his parents "used a needle to inject the 'feel-good medicine' into him and his sisters."

Police say marks and bruising consistent with needle injections were also found on the children's bodies and tests showed low levels of what was believed to be heroin in two of the children.

The pair face three counts each of unlawful delivery of a controlled substance to a minor, among other other charges.