British paratroopers on Monday night arrested five members of the KLA following the killing of a Serb man in the province's capital, Pristina.
The paratroopers surrounded a house in the north-east of the city after a distraught family approached them saying a relative had been shot. Following a tense stand-off, five KLA fighters, including one woman, came out with their hands high and surrendered. Their weapons were seized and all five were being questioned about the killing.
In the absence of a civil authority in Kosovo, it was not clear how or where they could be charged or detained.
Amid the growing exodus from Kosovo of Serbs fearful of reprisals by ethnic Albanians, a military source said it was hoped the operation to arrest the KLA members would help Kfor to convince people of its impartiality.
"This is one of a number of incidents which we hope will illustrate our even-handed approach," a military spokesman said.
A Kfor spokesman, Lieut Col Nick Clissitt, said: "All people arrested by the paratroopers are now in custody and their weapons have been taken. No shots were fired at British troops."
Overnight in Pristina there were a number of other shooting incidents, although there were no reports of British soldiers coming under fire.
At the airport a rocket-launched grenade was fired from the ground outside but it did not hit or hurt anyone.
In another incident, an Albanian man was shot through the head yesterday in Pristina. The man, in his mid-20s, was said to have been shot by a Serb paramilitary policeman who was on his way out of the city to comply with the midnight deadline. The wounded Albanian was brought to the headquarters of the Irish Guards on the outskirts of the city.
Military sources said gunfire was still being heard in parts of the city last night.