Gunshots rang out from the upscale mall in Kenya's capital even after the President declared an end to a four-day siege by Islamic militants.
Government spokesman Manoah Esipisu said the shots were fired by Kenyan forces going through the building. But a top security official says Kenyan forces are still investigating where shots fired the night before came from.
The official spoke on condition of anonymity because of the sensitivity of the information.
Meanwhile Kenyans began three days of mourning on Wednesday as authorities prepared for the gruesome task of recovering possibly dozens more victims.
The city morgue says it's preparing to enter the mall and retrieve bodies from inside the mall where three floors collapsed.
The attack claimed by Somali militant group al-Shabab killed at least 67 people and five extremists.