Pandit, 61, was identified Monday night along with six others: Michael Arnold, 59; Sylvia Frasier, 53; Kathy Gaarde, 62; John Roger Johnson, 73; Frank Kohler, 50; and Kenneth Bernard Proctor, 46.
No further details were available about the victims.
The 13 dead include alleged gunman Aaron Alexis, 34, who was killed after an encounter with security in Monday morning's shooting at the Washington Navy Yard, Mayor Vincent Gray told reporters.
Eight other people were injured in the incident. Three of those injured were shot, including one Washingtonpolice officer, Scott Williams, who was shot in the leg, Gray said.
"The other five injuries range anywhere from stress reaction to someone who fell and had a head injury, contusion to the chest, arm abrasions and chest pain," he said.
One employee who survived the morning's gunfire hid in a locker for nearly 11 hours, police told The Washington Post. A SWAT team found the worker in the locker at around 7 p.m.
Meanwhile, Washington police expressing confidence that only one person was involved in the shooting started lifting a shelter-in-place order for residents who live nearby, Police Chief Cathy Lanier said Monday night.
Investigators have "exhausted all means available to support or discount" the lookout order issued earlier for a possible shooter in addition to suspect Alexis, she said.