Pro-Iran protesters dug in outside the US embassy in Baghdad on Wednesday, throwing rocks and burning US flags a day after making a dramatic incursion into the compound. Thousands of Iraqi supporters of the largely Iranian-trained Hashed al-Shaabi paramilitary force had gathered at the embassy on Tuesday, outraged by US strikes that killed 25 Hashed fighters over the weekend. The protesters set up portable toilets and some 50 tents outside the perimeter wall vowing not to leave until US forces quit Iraq.