Sales of synthetic marijuana have spread from city bodegas to the Internet, and local officials are calling for regulations to stamp out the dangerous drug.

The colorful packaging and names like "Scooby Snax" are designed to entice young people to try synthetic marijuana, also known as K2. The drug is marketed as a marijuana alternative, but experts say it's especially dangerous because there's no way of knowing what each batch contains.

Bronx resident Lewis Cruz says he got a dose of the drug's effects after seeing his son on it. Several months ago, his son walked eight hours from the Bronx to Nyack with no food or water, and was babbling and hallucinating.

State Sen. Jeffrey Klein says an investigation by his office reveals that the Internet has become a warehouse for the drug.

State officials are now ordering websites like eBay and Craigslist to pull down listings for K2.

Klein and others are calling for stricter penalties for those who sell the drug.