RINGWOOD - Police are warning parents to be on the lookout for an old drug making a comeback in northern New Jersey.

Officers say hash oil, also known as "honey oil" or "wax," is becoming more popular with young drug users. The drug is made by cooking a marijuana plant. It resembles molasses or candle wax.

Police say the oil offers a faster, more intense high than traditional marijuana. It is inhaled through a smoking device.