According to a military statement, Iraqi lawmakers reconvened after quorum was reached to postpone the session, with at least two hundred and sixty nine of the three hundred and twenty nine members attending the session.
A first round of voting on the presidential nomination resulted in failure to reach required two-thirds majority. A second round was under way before the incident.
Preliminary information suggests that at least nine rockets landed in and around the fortified area as the parliament was about to begin its session, which has been boycotted by members of parliament affiliated with powerful Shia leader Muqtada al-Sadr.
In a similar incident, rockets hit the Green Zone last week as the parliament was about to vote for the deputy speaker of parliament.
The country has witnessed months of political deadlock after al-Sadr last year emerged as the biggest winner in a parliamentary vote, but failed to rally enough support to form a government.
