He cited Belgrade television as the source of this report.
The Belgrade television said 100,000 people had joined the demonstration.
On Belgrade television, it will be presented as Serbs.
Belgrade television showed a Serbian paramilitary force executing Muslim men in 1995.
"The situation in Kosovo is approaching civil war," Belgrade television said.
At least three members of the security forces were badly injured, Belgrade television said.
Belgrade television said that three soldiers died when a helicopter crashed in downtown Ljubljana.
The fact that three of them could be presented on Belgrade television as model students reflected the media's new tone.
The Belgrade television cited unconfirmed reports from diplomats and travelers.
Belgrade television reported this weekend that 2,000 to 5,000 people had been killed in the battle for Vukovar.