Nine people have been killed in the city since the cease-fire, including a Bosnian soldier reported killed overnight.
He said the Bosnian soldier had been hit in the back, but was out of danger.
Three days ago, though, according to Bosnian soldiers based nearby, Serbian troops began to return.
Earlier in the week, some Bosnian soldiers had surrounded the squad's armored car and fired into the air.
Some Bosnian soldiers are even calling themselves mujahedeen, or holy warriors.
Four days later, they crossed a mine field at the front line and were met by Bosnian soldiers.
"I think there are still Bosnian Serb soldiers within that circle," he said.
One Bosnian Serb soldier was also killed and three captured.
We scrambled to the next apartment house, and found ourselves holed up with a group of Bosnian soldiers.
A Bosnian soldier motioned for me to look down and to the left, by the bridge.