[R] two tables with read.table?

[solares@unsl.edu.ar]

Hi, How i cant split with the function read.table a file with many tables 
in your inner, for example

file probe.txt
---------------
text1
text2
 colA colB
1 5   6
2 7   8
text3
text4
 colC colD
1 9   10
2 11  12
----------------
i like two tables:

table1<--colA and Col B 
and
table2<--colC and Col D

Have use a Regular Expression? Thanks