ROSWELL, N.M. (AP) -

Authorities say they're puzzled by what turned up in a package of meat at a Roswell grocery store.
    
A worker at Albertsons opened a case of frozen ribs Wednesday and found a handgun and ammunition packed with the meat.
    
Roswell police Sgt. Jim Preston said that it would be speculation to say how it got there.
    
Authorities have some clues.
    
A police report showed the meat came from the Swift Packing Plant in Greeley, Colo., and is marked with the date June 8, 2011.
    
Greeley police said they're reviewing cases to see if the gun was used in any crimes.
    
Authorities said the semi-automatic Rock Island Armory .38 Super had not been reported stolen.  A firearms trace could take weeks.