Each side is accusing the other of changing its mind.
Each side has accused the other of slowing the process.
Neither side is accusing the other of cooking the books.
Today each side accused the other of putting political motives before the national interest.
Last night each side was accusing the other of acting in bad faith.
Both sides have accused the other of many violations in the last few days.
Both sides have accused the other of lying about what is happening.
Each side in the dispute has accused the other of preparing for war.
Each side accused the other of approaching the agreement in bad faith.
Each side has accused the other of promising more than it can deliver.