Before being bought by iHeart, WOR ran NBC Radio newscasts late nights and weekends. (We're talking about the most recent NBC radio, which used some NBC TV anchors but was run by Westwood One). Since iHeart has a news operation in NYC that offers its service to other station owners, really part of Total Traffic, it wasn't much of a stretch for it to do WOR news apart from Joe Bartlett's morning newscasts, which are still done at the WOR studios so he can interact with Len Berman, Todd Schnitt and Mark Simone.
Of course, it is somewhat unique that iHeart has a live anchor offering local newscasts exclusively for WOR at the top of all hours, days, nights and weekends, even at 5am on a Sunday, I believe. As mentioned above, local news is even done between the many weekend infomercials. The only exception is when sports events, such as Mets games, preempt local programming.