Just had radiator replaced, now car is showing very low refrigerant warning. Could this be related?

I have a 1997 Cadillac Deville, and I just got my radiator replaced a few days ago. Today I got a "very low refrigerant, a/c compressor turned off" warning on my dash, and was wondering if there was any way that something could've gotten messed up with my a/c system when the mechanic was doing the radiator work that would cause a refrigerant leak. Alternatively, is it possible that the radiator work would have caused an a/c/ sensor to go off and give me the message in error? Any help would be appreciated.