The jurors in Bill Cosby's sexual assault trial have concluded their fourth day of deliberation, unable to reach unanimous a verdict against the entertainer.
Judge Steven O'Neill sent the jurors, many of whom looked exhausted, back to their hotel late on Thursday after praising them for their efforts.
The jury will return to the courthouse in Norristown, Pennsylvania, on Friday after completing about 40 hours of deliberations.
O'Neill had instructed the jurors to continue trying to decide on Thursday morning following a note in which they said they could not agree on a verdict on three counts of aggravated indecent assault.
Cosby, 79, is accused of drugging and sexually assaulting Andrea Constand, then 31, at his home near Philadelphia in 2004.
Constand and other accusers say Cosby, the star of the 1980s hit TV comedy The Cosby Show, often plied them with pills and alcohol before assaulting them in incidents over four decades.
Constand's allegations are the only ones to result in criminal charges, with many of the others too old to allow for prosecution.
Cosby has denied every claim, saying his encounters with Constand and others were consensual.
Prosecutors would have the option of seeking a retrial if the jury cannot reach a verdict.
Following the jury's morning note, one of Cosby's accusers, Jewel Allison, began crying.
Soon after, Cosby protesters and supporters faced off in verbal confrontations outside the courthouse.
O'Neill rejected a motion from Cosby's lawyers for a mistrial on Thursday morning.