Croatian leaders have vowed never to permit that, saying they will retake the region, by force if necessary.
The federation businesses work with Muslim and Croatian political leaders, the diplomats say.
The meeting continued after the Croatian leaders left, but there was no immediate word on how talks went.
Serbian and Croatian leaders insist they have made their last offer.
Croatian leaders fear that the division of their country will become permanent if it is not challenged soon.
Croatian leaders, sounding placatory, say it is time to do just that.
The men blocking the road this morning were called out by Croatian political leaders, the officials said.
In these the Croatian leader appeared to criticize some aspects of the plan, raising doubts about whether he was prepared to cooperate.
Today, Croatian leaders say they have no contact with the new Muslim officials.
We in this House have on several occasions been encouraged by recent dialogue with Croatian leaders.