Thursday, May 13, 1999 Published at 15:44 GMT 16:44 UK
Fischer pleads with German Greens
Pacifist Greens scuffle with police outside the conference hall
There have been angry demonstrations both inside and outside a special Kosovo conference of the German Green Party.
The pacifist party, which is the junior partner in Chancellor Gerhard Schröder's government, has been deeply split over Germany's participation in Nato air strikes.
Inside the hall, the party's grass-root supporters displayed their anger and some Green cabinet ministers were hit on the face by eggs thrown from the audience. Mr Fischer was hit on the shoulder by a bag of red paint.
Scuffles followed as demonstrators tried to hang peace posters behind the podium before being led away.
But self-styled "realist" Green MPs argue that the bombing is both necessary and justifiable.
Mr Fischer, who also holds the post of foreign minister in Chancellor Schröder's cabinet, has warned his party not to back calls for an indefinite Nato ceasefire. He has reportedly said he will resign if the proposal, which is against government policy, is passed.
Threat to unity
It would also be a damaging blow to Nato unity.
The party leadership has proposed an alternative resolution, calling for a temporary ceasefire to allow new negotiations on Kosovo.
The BBC's Bonn Correspondent, Caroline Wyatt, says the party now faces a key decision on whether to stick to its pacifist principles and return to the political sidelines, or to stay in government and try to influence policy from within.
The party leadership has said it is optimistic that a deal can be hammered out, but the strength of feeling on display shows the party is deeply divided.