Why would Sunni attacks continue virtually unabated?

Both of these attacks appear to have been aimed at killing Shia civilians, as has been the case with most of the recent bomb outrages, says the BBC’s Jim Muir in Baghdad.

These have continued virtually unabated despite the current security surge by US and Iraqi government forces in Baghdad.

The Shia militias have stood down in deference to that security plan but their compliance is bound to be strained by these continuing highly provocative attacks on their community, our correspondent says.

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