"(A) policeman has died while another one is in critical condition," a source at a Skopje hospital told AFP on condition of anonymity as Macedonia began two days of official mourning for victims of the violence.
The government said earlier that five policemen had been killed and some 30 injured in clashes with unidentified gunmen in Kumanovo that erupted yesterday at dawn.
"There are victims among the terrorists but for the time being we cannot give the exact number," Interior Minister Gordana Jankuloska told reporters late yesterday.
Violence broke out when police moved in to dismantle what they called a "terrorist group" that allegedly entered Macedonia illegally from a neighbouring country.
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Local media suggested the assailants came from neighbouring Kosovo, populated mostly by ethnic Albanians.
In 2001, Macedonia's ethnic Albanian rebels staged an insurgency in the Balkan country.
Sporadic shooting continued in Kumanovo this morning, media and officials said.