But since then, United Nations officials have said he was killed at a place also exposed to a Serbian line of fire.

"We were once rich," said a man from the town of Cavtat, which lay behind Serbian lines until 10 days ago.

There its advance stopped, although the Serbian line of control was very close to the north.

Another 55 Canadian troops were trapped behind Serbian lines in central Bosnia, officers said.

But there was no evidence that Serbian lines had been broken.

He said he believed that it would be safer to remain in the woods than pass through Serbian lines.

We had been waiting for three days behind Serbian lines.

We are exploiting weak points in the Serbian lines.

United Nations officials said their convoys were still unable to get through Serbian lines in the east.

As in previous incursions, the captured men, said by witnesses to have been unarmed civilians, were taken away to detention camps behind Serbian lines.