(NBC) -- Millions of MEGA Brands action figures and play-sets are being voluntarily recalled due to hazards posed by the tiny magnets they contain.

Among the items being recalled are the MagnaMan action figures, Magnastik, and Magnetix Jr. play-sets.

Roughly 1.3 million action figures and 1.1 million play-sets have been sold at Wal-Mart, K-Mart and Toys R Us stores since January of 2005.

So far one child has received medical treatment after swallowing a magnet that came loose from one of the play-sets.

No injuries have been reported in relation to the action figures, but MEGA Brands has received numerous reports of magnets coming loose from them.