DETROIT -

A mistrial has been declared after jurors said they won't continue deliberating in the trial for a Detroit officer charged in the 2010 shooting death of a 7-year-old girl.

The jury sent a note Tuesday to Judge Cynthia Gray Hathaway saying no significant progress had been made toward a verdict in their three days of deliberations. Nearly two hours later, that was followed by another note that said the jury was unable to reach a verdict.

The development came just hours after Hathaway ordered everyone out of the courtroom when raised voices could be heard through the closed door of the jury room. A deputy quickly went inside.

Joseph Weekley was charged with involuntary manslaughter. He accidentally fired his gun, killing Aiyana Stanley-Jones, while leading officers on a raid to find a murder suspect in 2010.

He said he pulled the trigger during a struggle with the girl's grandmother, but Mertilla Jones denied interfering with the gun.

Hathaway said a the case will return to court on July 25.

Mertilla Jones said she was upset with the racial makeup of the jury -- 11 whites and one African-American.

"Yeah, I was worried. Of course I was. Cause I'm from the 'ghetto in the city of Detroit.' You know what I'm saying? They look at us like we're dirt," she said.

Statement from the "Justice for Aiyana Jones Committee"

“From the start, the Justice for Aiyana Jones Committee (JAJC) had no confidence in this jury that had only one African-American juror from a county that is over 42 percent African-American. This is a bittersweet outcome; “bitter” because Weekley was not convicted; and “sweet” in that justice for Aiyana Jones will come soon. Whatever verdict comes in the future, Aiyana and her family and many of us will forever mark her brutal death as one of the most horrific in our lifetime."

--Roland Lawrence, Chairman, JAJC