At least three blasts rocked the center of Kosovo's capital on Saturday, and one targeted the U.N. (search) mission headquarters.

An Associated Press reporter saw at least three U.N. vehicles set ablaze in the parking lot of the U.N. mission headquarters in Pristina (search). There were no immediate reports of any injuries after at least three near-simultaneous blasts, said Hua Jiang, chief U.N. spokeswoman.

The second blast detonated near the building of the Organization for Security and Cooperation (search) in Europe, the OSCE, which is a block away from the U.N. compound.

The third blast went off near the Kosovo government building which also houses the province's parliament and damaged it slightly, said Jiang. She did not say what caused the blasts.

Police sealed off the areas after the explosions.

Kosovo has been administered by the U.N. mission and patrolled by NATO (search)-led peacekeepers since 1999 after the alliance's bombing of Serb forces waging a crackdown on separatist ethnic Albanians.

The province remains disputed between its ethnic Albanian majority who want it to become independent, and Serbs demanding it remain part of Serbia-Montenegro, the union that replaced former Yugoslavia.

Talks to determine its future status will take place later this year, if the province reaches standards including those on democracy, rights of minorities, and rule of law.

U.N. Secretary-General Kofi Annan last month appointed a senior Norwegian diplomat Kai Eide to evaluate progress and report back to him by the end of summer. Eide arrived in Kosovo on Friday, on his second fact-finding visit since his appointment.