A Pakistani-origin man is believed to be the security and training chief of Al Qaeda linked Shahab group that carried out the horrific attack at Westgate mall in Nairobi killing at least 59 people.
Abu Musa Mombasa, a Pakistani citizen, serves as Shabaab's chief of security and training, the Long War Journal had said in a 2010 report.
Kenyan troops were locked in a fierce firefight with Somali militants inside the Nairobi shopping mall today, in a final push to end a siege that has left 59 dead, including two Indians, and wounded 200 others with an unknown number of hostages still being held.
Somalia's Al Qaeda-inspired Shebab rebels said the carnage at the part Israeli-owned complex was in retaliation for Kenya's military intervention in Somalia, where African Union troops are battling the Islamists.
Meanwhile, the Twitter account of Somalia's Shabab rebels was suspended yesterday after they used the site to claim responsibility for the attack.
However, the group seems to have launched a new twitter account @HSM-PressOffice.
The Shabab's previous account, @HSMPress, was suspended in January after it posted photographs of a French commando they killed and threatened to execute Kenyan hostages.
Not to be deterred, they opened another account, @HSMPress1, but were again suspended earlier this month after threatening Somalia's president.
The group had issued a series of messages on Twitter yesterday, claiming its fighters were behind an attack.