Kenya's interior Cabinet secretary says at least 59 people were killed and 175 wounded in the attack by al-Qaida-linked militants at an upscale mall in Nairobi.

Joseph Lenku said Sunday that about 1,000 people have been rescued so far from the Westgate mall.

The gunmen remain inside with hostages nearly 24 hours after they launched the attack with grenades and assault rifles.

Lenku said that there are 10 to 15 attackers involved. He said that Kenyan forces have control of the security cameras inside the mall. Combined military and police forces have surrounded the building.

The Somali militant group al-Shabab claimed responsibility for the attack, and targeted non-Muslims.