The explosions boost fears that insurgents will renew attacks now that U.S. troops have left. Coordinated bombings targeting Shiites are the hallmark of Sunni militants linked to Al Qaeda.BAGHDAD— A wave of explosions struck two Shiite neighborhoods in Baghdad on Thursday, killing at least 27 people and intensifying fears that insurgents are stepping up attacks after the U.S. troop withdrawal that was completed last month.
The attacks began with the explosion of a bomb attached to a motorcycle near a bus stop where day laborers gather to look for work in the Sadr city neighborhood. One of those who witnessed the attack said it filled the area with thick black smoke.
<snip>
The two Sadr City blasts killed 12 people, according to police and medical officials.
Less than two hours later, two explosions rocked the Shiite neighborhood of Kazimiyah in the north of the capital, killing 15 people. Officials said the Kazimiyah blasts occurred almost simultaneously, with at least one caused by a car bomb.
http://www.latimes.com/news/nationworld/world/la-fgw-iraq-bombings-20120106,0,880838.story