The Bosnian forces began a coordinated attack on Croatian positions in central Bosnia's Lasva River valley eight days ago.

I was about to return fire but saw it came from a Croatian position.

The President's action came after planes flown by Serbs stepped up their bombing raids against Muslim and Croatian positions in recent weeks.

Serbian forces in Bosnia have been using their combat planes to attack Muslim and Croatian positions in violation of a pledge not to undertake combat flights.

Sarajevo television reported that Yugoslav jets attacked Croatian positions near Kupres twice this morning.

A spokeswoman for the Croatian militia said Bosnian Government forces had launched an attack on Croatian positions from three directions at dawn.

An official spokesman of the Croatian militiamen denied that the fatal gunfire came from Croatian positions.

While this was under way, three Yugoslav Navy patrol boats shelled Croatian positions on the coast just south of here.

Bosnian Serb officers say the Croatian position was discovered and the soldiers were killed or escaped.

The mujahedeen served as shock troops for the Bosnian Army and have suffered severe casualties in frontal assaults on Serbian and Croatian positions.