Mexican officials are reportedly investigating how 7Up soft drinks laced with methamphetamines made their way onto shelves in Baja California, sickening several and killing one.

The health department of Baja California has issued a statement confirming that 7Up products in the Mexicali region — where the contaminated soft drinks had originally been reported — have been pulled from stores as a precaution. The manufacturers have also been notified of the issue, and more than 77,000 individual containers of 7Up have been secured at a Mexican plant belonging to PepsiCo.