SQL & PL/SQL :: How To Write Single WITH For A Update And Delete

Can I achieve the merge (update-only) and delete in a single SQL statement?

merge into table_4
using
(select table_3.col1 col1,table_3.col2 col2,
from table_1, table_2, table_3
where
[code].....

delete from table_3 where <records identified in the 'using' clause of above merge>;

i.e.

delete from table_3
where (table_3.col1,table_3.col2)
in ( select table_3.col1,table_3.col2,
from table_1, table_2, table_3
where
join conditions.....
other conditions ....
group by table_3.col1, col1,table_3.col2
having count(*) >1 );

What I want is roughly as following :

WITH mywith as ( select table_3.col1,table_3.col2,
from table_1, table_2, table_3
where
join conditions.....
other conditions ....
group by table_3.col1, col1,table_3.col2
having count(*) >1 )
update table_4 set col3='N' where table_4.col1=mywith.col1 and table_4.col2=mywith.col2
delete from table_3 where table_3.col1=mywith.col1 and table_3.col2=mywith.col2;