After an NBC4 I-Team investigation revealed that some of California's medical marijuana supply was contaminated with potentially toxic pesticides, several local dispensaries have pulled cannabis products off their shelves.

And, the California agency responsible for overseeing medical cannabis is promising that safety regulations, which would aim to prevent pesticide contamination, are coming by the end of the year.

"We literally just pulled them off the shelf. We don't feel comfortable giving that to our patients," said a manager at the Hollywood High Grade Dispensary. Tests commissioned by the I-Team found at least three products sold at Hollywood High Grade contained pesticides.

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