Ethnic Albanian rebels and Serb security forces operating in the Presevo Valley agreed a NATO-brokered ceasefire earlier this week.

CNN: Serb police hurt on Kosovo border

But this has nothing to do with Serb security forces but is a danger that everyone in Kosovo shares.

BBC: Quiz our correspondent in Kosovo

Disgust over the Serb security forces' behaviour has united public opinion and policymakers in America, Britain, France and Germany.

ECONOMIST: A survey of NATO