Samsung said it would add the recently unveiled smartphone -- which has already seen record pre-sale figures and which will hit stores tomorrow -- to a list of products accused of violating its patents, according to Reuters, citing U.S. court documents.
The two companies are in the midst of a bitter legal war over intellectual property. Apple recently scored a big victory over Samsung in a Federal court in San Jose, Calif., but the two companies have several existing lawsuits going on in different countries around the world.
Samsung has already taken its case to consumers; the South Korean conglomerate released an ad yesterday slamming the iPhone 5 and people waiting in line for Apple products.
Analysts, meahwhile, believe that the iPhone 5 could be poised for record sales spurred by pent-up demand from consumers who skipped the last refresh, the iPhone 4S.
CNET has contacted Apple for comment, and we'll update the story when the company responds.