ROBBINSDALE -- Law enforcement agencies in Minnesota are warning of a rise in seizures of a potent marijuana concentrate.

Authorities say marijuana wax has a stronger concentration of THC, marijuana's psychoactive ingredient. The substance comes in the form of powders, oils and solids that look like peanut brittle or honeycombs.

The Northwest Metro Violent Crime Enforcement Team held a news conference Friday about the dangers of marijuana wax.

Authorities say seizures of the illegal drug in Minnesota have risen dramatically in recent years.

Cmdr. Robert Topp says the wax is making its way to Minnesota from states such as Colorado, Washington and California, where marijuana is legal in some form.

Authorities want parents to know that the wax looks nothing like traditional leafy marijuana.