Identifying a birdnest

Hello, greetings to all as I am new to this forum (hope I am in the right one, this forum organization is a total mess, as one cannot figure out where one is posting). Anyway, we were doing some work on our community allotment site and found a nest with four little bluish green eggs with small dots on them. We kept the vegetation around the nest intact and hoped the parents came back. But we do not seem to see the parents, the eggs are still in the nest. Could anyone identify the eggs and give any advice if the parents abandoned them?. Thanks, JP