(VOI) -- An Iraqi army police force on Sunday threw a security cordon around nine sectors in Baghdad's Sadr City in the aftermath of military confrontations that took place last night between army personnel and local gunmen, eyewitnesses said.'Today, a force from the Iraqi army threw a security cordon around sectors no. 35, 36, 38, 70, 71, 72, 73, 74 and 75, following the armed clashes that occurred last night in light of the detention of Abbas Abdul Aal, a senior Sadrist leader, and his nephew, Diyaa' a local eyewitness told Aswat al-Iraq- Voices of Iraq- (VOI). 'Security forces closed all of the city's outlets and prevented the movement of traffic and pedestrians,' the eyewitness noted. Baghdad's eastern city of al-Sadr includes 79 sectors, each contains 1,000 houses. The city's total population is estimated at 3 million. Another eyewitness told VOI that local residents stayed home in the aftermath of the clashes that broke out last night in the city.