SQL & PL/SQL

I've been using the INSERT INTO table (..) VALUES (...) RETURNING id INTO var in several queries/procedures with success.
Now I have an INSERT query based on a SELECT, but when I add the RETURNING INTO statement it's causing an error when I try to compile the proc:

INSERT INTO table (a,b,c)
SELECT a,b,c FROM table2 WHERE x = y
RETURNING table.id
INTO var

Line # = 63 Column # = 3 Error Text = PL/SQL: SQL Statement ignored
Line # = 99 Column # = 3 Error Text = PL/SQL: ORA-00933: SQL command not properly ended