C compilation exception switch a label can only be part of a statement and a declaration is not a statement

Client. C: 996: Error: A label can only be part of a statement and a declaration is not a statement

Switch (){
Case 1:
....................
....................
....................
Break;
Case 2:
Break;
}

The following error occurs during GCC Compilation:
Error: A label can only be part of a statement and a declaration is not a statement
But with the following Brackets added, there is no error. Why? Compiler problems?
Switch (){
Case 1:
{
....................
....................
....................
}
Break;
Case 2:
Break;
}
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C compilation exception switch a label can only be part of a statement and a declaration is not a statement