ARMED MAN 'IN SERBIAN PRESIDENCY'!

A man armed with two hand grenades has entered the presidential offices in the Serbian capital Belgrade, say reports.

Serbia's B92 news channel said an unidentified man was at the entrance to the building and police officers were on the scene.

It is not clear whether President Boris Tadic is in the building.

The news comes a day after US Vice-president Joe Biden became the most senior American to visit Serbia since the 1999 conflict in Kosovo.

"A police negotiating team went to the presidency building to try to convince the man to give himself up," a police source told the AFP news agency.

The source said the man had left one grenade at the entrance to the building, on Andricev Venac Square, and gone inside "with the safety pin removed from the second".

The man was "a psychiatric case" and had been isolated by police, Reuters quoted a police officer as saying.

Roads in the area are reported to have been closed.

BBC NEWS REPORT.