09/30/2013 08:58 EDT | Updated 11/30/2013 05:12 EST

Kenya mall attack: Toronto-born teen undergoes surgery

The hospital treating a Toronto-born teen injured in last week’s deadly attack at a Nairobi shopping mall is expected to release new information Monday about her condition.

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Fardosa Abdi, 17, is being treated at Sunnybrook Hospital after arriving in Toronto on Sunday afternoon.

She was wounded along with her 16-year-old sister, Dheeman,  when gunmen from the al-Qaeda-linked group al-Shabaab stormed the Westgate mall in Nairobi.

Abdi suffered serious injuries to her legs and torso when a grenade detonated near her and her sister. Dheeman suffered a broken finger.

CBC's Trevor Dunn was at the hospital Monday.

“I just got off the phone with a spokesperson for the hospital, and right now there’s no update on Abdi’s condition," he  reported.

"I’m told that she underwent surgery yesterday, and right now the spokesperson is just trying to get ahold of the surgical team that did that work and will try to provide us with an update on her condition.

“All we know is that Abdi is here in hospital and that friends and family are with her.”

Both girls were born in Toronto but moved to Kenya a few years ago.

The four-day mall siege, which included the collapse of part of the mall, left 67 people dead, including two Canadians. The Red Cross says 59 people remain missing, though the government puts that number at zero.

Kenyans have become increasingly frustrated over the government's unwillingness to share information about the attack, reports say. Almost no details have been released about what happened after the first hours of the siege.