  We extend the results by Froelich and Spronk and Turowska on the connection
between operator synthesis and spectral synthesis for A(G) to second countable
locally compact groups G. This gives us another proof that one-point subset of
G is a set of spectral synthesis and that any closed subgroup is a set of local
spectral synthesis. Furthermore we show that ``non-triangular'' sets are strong
operator Ditkin sets and we establish a connection between operator Ditkin sets
and Ditkin sets. These results are applied to prove that any closed subgroup of
$G$ is a local Ditkin set.
