Security guards shot at a man trying to enter Kosovo Prime Minister Hashim Thaci's home late last night in what the government said was an attack on the house.
The prime minister's wife and son were at home, but Mr Thaci was outside Pristina. His family were unhurt.
Security guards at the house told police they had spotted a man on the balcony and there had been an exchange of fire. A police spokesman said later he could not confirm whether the alleged assailants had opened fire.
"Last night my family was attacked," the ethnic Albanian former guerrilla commander told a news conference on Saturday.
"No one should have the power to attack the rule of law, freedom and security of Kosovo," Mr Thaci said. He said he had no idea who was behind the incident.
Police said it appeared more than one person was involved, and that at least one had been wounded. Drops of blood could be seen on the balcony.
The government said it had stepped up security for cabinet officials after what it called an "attack" on Mr Thaci.
"This is a very serious event," deputy Prime Minister Hajredin Kuci told a news conference.
"We still don't have details or information on who is behind this criminal attack," he said.
Mr Thaci led the territory's 1998-99 guerrilla war against Serb rule, which ended in an 11-week NATO bombing campaign to drive out Serb forces and halt their killing and ethnic cleansing of Albanian civilians.
Mr Thaci became prime minister in January, and Kosovo declared independence from Serbia the following month, after nine years as a ward of the United Nations.
Kosovo's postwar politics has been marked by bitter, sometimes violent rivalry. The main political factions control competing security and intelligence structures, and have often been accused of links to organised crime.
President Fatmir Sejdiu condemned the incident.
"This is an attack not only against Thaci and his family but against the institutions of the Republic of Kosovo," he said in a statement.
Mr Sejdiu's predecessor, the late Ibrahim Rugova, escaped two attacks on him after the war, including a bomb attack on his convoy in 2005.
Kosovo has been recognised by more than 40 states, including the United States and most members of the European Union.