An official carries a young boy during a rescue operation at the Westgate shopping mall after a shootout in Nairobi, Kenya,on Saturday.
(Photo: Kabir Dhanji, EPA)
NAIROBI, Kenya -- A standoff at Westgate Mall in Kenya, Africa continued into Monday as black smoke rose over the besieged mall.
The Federal Bureau of Investigation is looking into whether five Americans were among those killed in the weekend's terror attacks.
PHOTOS | Deadly Kenya Mall attack
Gunshots also were heard outside the Westgate Shopping Mall about 1:20 p.m. Nairobi time, but it was not clear whether the siege, in its third day, was nearing an end.
Kenyan authorities claimed earlier Monday that they had made progress against terrorists inside the mall, where at least 69 people have died.
more than 100 others were hurt in two days of attacks at Westgate. Several Americans were among the injured but managed to escape the carnage.
"All efforts are underway to bring this matter to a speedy conclusion," the Kenyan military said on Twitter about 11:30 p.m. Sunday, Nairobi time (4:30 p.m. ET). Another tweet said that "most of the hostages have been rescued and security forces have taken control of most parts of the building."
An unspecified number of hostages then were freed overnight, the head of the Kenyan police force said.
Inspector General David Kimaiyo tweeted at noon Monday local time: "We have managed to rescue more hostages overnight and very few are remaining. We are also closing in on the attackers."
Outside the security perimeter around the mall, volunteers waited Monday for their chance to go inside and recover bodies.
At a community center nearby, a distraught woman continued to seek information about her missing husband, a mall employee.
Sporadic gunfire continued into Monday morning, but it could not be determined if security forces or militants were firing at each other.
Israeli special forces were at the scene, Kenyan government sources told CNN.
The FBI is looking into claims by Al-Shabaab of American citizens being involved the attack but have not confirmed the claims, law enforcement officials told CNN.
Secretary of State John Kerry is condemning the attacks.
"It represents the seriousness and the breadth of the challenge that we face with ruthless and completely reckless terrorists," Kerry said.
An Army spokesman said the military took control over most of the building but it's reported that nearly a dozen hostages are still inside.
CNN contributed to this report.