What is postgresql doing for "statement: commit;begin;"

Hi All

I've turned on slow query reporting via log_min_duration_statement, and
I've been looking through the log files.

Quite a lot, I'm seeing lines like:
2005-01-17 13:11:15 LOG:  duration: 4688.108 ms  statement: commit;begin;

Is there any way to find out what exactly got executed here?

Thanks
Nick