Lost Pet: Monty LaGrange

Circumstances

Monty (12) has been missing now for over 3 days and we're getting increasingly worried as he never strays far and he's usually back in the house before dark.  He might be with our other cat, Zek (2), who is also missing and is a gray Russian Blue mix. Unfortunately doesn't have a collar, but does have a microchip.  Pls, if you know anything about where he (or Zek) are, pls reach out to us.  His family misses him very much and is so very worried.  Reward for safe return.