Back-to-back suicide bombings killed at least 55 people Friday outside the most important Shiite shrine in Baghdad, police officials said. The police official says another 125 people have been wounded in the blasts Friday in the northern Baghdad neighborhood of Kazimiyah. The official says the bombers detonated explosive belts within minutes of each other near gates of the tomb of the prominent saint Imam Mousa al-Kazim. Another police official said the bombers struck shortly before the start of Friday prayers as worshippers streamed in to the mosque an important site for Shiite pilgrims. The attacks come a day after bombings killed nearly 80 people, making it the most deadly day in Iraq this year.