AUBURN — A jury deadlocked Friday on whether a Lewiston man was guilty beyond a reasonable doubt on two assault charges stemming from a stabbing at a Lewiston bar last year.

Percell R. William, 50, of 67 Pierce St. was indicted by an Androscoggin County grand jury on charges of elevated aggravated assault and aggravated assault in the August stabbing of Edward E. Ford, 52, at The Cage, an Ash Street bar.

Following a three-day trial, the jury deliberated Thursday afternoon and stopped shortly after 6 p.m. It resumed at 8:30 a.m. Friday before a judge let the jury go at 11 a.m.

The jury said Thursday it had reached a verdict on the first charge, but by Friday morning had disagreed on both counts. A unanimous verdict among 12 jurors is needed in criminal cases.

Ford had been stabbed three times in the chest and treated at a local hospital, police said. He said William stabbed him during a birthday party at The Cage. The defense said William had feared Ford and acted in self-defense.

Prosecutor had the burden of proving beyond a reasonable doubt that William had not acted in self-defense.

The judge granted defense attorney Leonard Sharon’s motion for a mistrial.

Assistant District Attorney Andrew Matulis said he would take the weekend to consider whether to retry William on the two charges.

William was released on bail.