The paper (Source of news) is a London based arabic language newspaper named "Al Sharq Al'awsat" which is not very reliable and trusted in quoting things from different unknown sources.
Iran Official Admits to Aiding Zarqawi in Iraq, Al-Awsat Says
http://quote.bloomberg.com/apps/news?pid=10000087&sid=av.QsBGSCP0g&refer=top_world_news
I don't deny what the mad regime of Iran is doing in Iraq today and we all know the reasons but this paper is not very trusted or reliable!