The wave of attacks came a day after Prime Minister Nouri al-Maliki lauded the progress of an ongoing U.S.-Iraqi security operation seeking to cripple militant factions and sectarian killings in the capital.
The suicide attacker detonated a bomb-rigged belt near the main entrance to the college, where students were resuming mid-term exams after the two-day weekend in Iraq. Police said that guards confronted the bomber as he tried to enter the college grounds.
Authorities say most of the victims were students at the college.
A 22-year-old student, Muhanad Nasir, said he saw a commotion at the gate. "Then there was an explosion. I did not feel anything for 15 minutes and when I returned to consciousness, I found myself in the hospital," said Nasir, who suffered wounds to his head and chest.
The school is located in a mostly Shiite district, but does not limit its enrollment to that group. It's part of Mustansiriyah University, which is located in another area of the city, and was the target of twin car bombs and a suicide blast last month that killed 70 people.
In Other Developments:
U.S. military envoys and pro-government leaders have worked hard to sway clan chiefs and other influential Anbar figures to turn against the militants, who include foreign jihadists fighting under the banner of al Qaeda in Iraq. The extremists have fought back with targeted killings and bombings against fellow Sunnis.
The imam of the mosque attacked Saturday had spoken out against extremists — most recently in this Friday's sermon, residents said. Many people in the neighborhood work for the Iraqi military and police forces, who frequently come under militant attack.
"There is no safe shelter for all outlaws," said al-Maliki, who reported that 426 militants have been captured since the Baghdad security campaign began Feb. 14.
But the crackdown also has sent Sunni insurgents fleeing the city to the nearby province of Diyala, which has emerged as a new and busy front for U.S. troops.
It has become so volatile that the Pentagon may delay plans to turn over control of Diyala to the Iraqi military by the end of the year, Maj. Gen. Benjamin Mixon told The Associated Press.