BBC: The most senior US general in Iraq has said he has evidence that Iran was behind Sunday's bombardment of Baghdad's heavily fortified Green Zone.
Gen David Petraeus told the BBC he thought Tehran had trained, equipped and funded insurgents who fired the barrage of mortars and rockets.
He said Iran was adding what he described as "lethal accelerants" to a very combustible mix.
There has as yet been no response from Iran to the accusations.
The rockets that were launched at the Green Zone yesterday, for example... were Iranian-provided, Iranian-made rockets