NEWARK -- Two men pleaded not guilty on Tuesday morning to charges of fatally shooting a young mother in Newark during a cell phone robbery in November.

Perry Howard, 28, of Bloomfield, and Mumit Marrow, 21, of Newark, entered the pleas during their arraignment on murder and related offenses in the shooting death of 22-year-old Newark resident Ana Satian.

Two other defendants - Massai Laboo, 23, and Lauren Whatley, 25, both of Irvington - also are charged in Satian's killing. Whatley was scheduled to be arraigned later in the day on Tuesday, and Laboo's arraignment is scheduled for Wednesday.

The four assailants were indicted on May 29 on murder, felony murder and robbery and weapons offenses.

Marrow and Whatley are being held at the Essex County Correctional Facility in lieu of $750,000 bail each. Howard and Laboo also remain in the county jail in lieu of $1 million bail and $300,000 bail, respectively.

Massai Laboo and Lauren Whatley, pictured left to right, have been charged in the fatal shooting of 22-year-old Newark resident Ana Satian.

During the arraignment for Howard and Marrow, Essex County Assistant Prosecutor Eric Plant, who is handling the case, said the evidence was "quite voluminous," including surveillance videos and statements made by three of the defendants.

In order to give the defense attorneys time to go through the evidence, Superior Court Judge Ronald Wigler directed the parties to return to court on Sept. 9.

The shooting occurred on Nov. 8 as Satian was visiting her friend's house on 3rd Street in Newark, authorities said. As Satian was walking into the house, at least two of the defendants approached her, stole her cell phone and shot her, authorities said.

The following day, Satian died from her injuries at University Hospital in Newark, authorities said.

Authorities said the cell phone was later discarded and recovered nearby. A few days later, authorities released photos of a white Maxima that was believed to be involved in the fatal shooting.

The mother of two young children, Satian was born in Ecuador and moved to the United States when she was seven years old. She attended Newark Tech High School before becoming married and having children.

Bill Wichert may be reached at bwichert@njadvancemedia.com. Follow him on Twitter @BillWichertNJ. Find NJ.com on Facebook.