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NATO peacekeepers in Kosovo have brought in more troops to a disputed border crossing in the ethnic Serb north, a day after several people were hurt in clashes. Both sides blame each other for starting the violence, which saw rubber bullets and tear gas used by Alliance forces. Anger rose in late July when Kosovan authorities tried to seize the frontiers to enforce a trade embargo. Peace analyst John Laughland says the region was doing fine until the EU stepped in.