Casualties from Wednesday's wave of attacks across Iraq rose to 93 people dead and 312 wounded, the Interior Ministry said Thursday, making it the deadliest day in the country since the United States withdrew its troops in December.

Shiite pilgrims making the trek to a shrine in Baghdad were the victims of the terrorist attack, which left many stunned.

"I am deeply shocked and utterly dismayed by the despicable attacks across Iraq today that have claimed the lives of scores of Iraqis, including many pilgrims, and have injured dozens more," Martin Kobler, the U.N. secretary-general's special representative for Iraq, said Wednesday.

The U.S. Embassy in Baghdad said the attacks “killed and wounded innocent men, women, and children of all religious and ethnic backgrounds."

This violence sparks fear of renewed violence among the different sects in the Middle Eastern country. Most residents are Shiites, but under former dictator Saddam Hussein’s rule, the minority Sunnis held a great deal of power.

After his ouster, Sunni’s remained influential and in power, which led to a massive increase in attacks, which had waned in recent years. Wednesdays attack however, is reminiscent of the violence that marred the last decade.

Al-Qaeda’s umbrella group, a band of Sunnis that has targeted Shiites, claimed responsibility for the attacks.