See this early report from Lyle Denniston, who says the Court did not conclude whether these cases are non-justiciable.  He also says the court rejected a challenge to mid-decade redistricting.  If Monday is any guide, it may be up to an hour before the opinion actually becomes available in electronic form to read.  As soon as I have a link, I’ll post it, and analysis will follow once I’ve had a chance to read the set of opinions.
Here is an early AP report.
CORRECTION:  The original headline of this post referred to district 24 being struck down. Lyle is now reporting that District 24 was upheld, and District 23 struck down.  I can’t verify any of this yet because I have not yet seen the opinions.
UPDATE:  I have posted the opinion here.