(CNN) -- At least two people were killed and 14 wounded when four roadside bombs exploded Thursday in different neighborhoods in Baghdad, the Interior Ministry said.
The attacks came the same day the U.S. Vice President Joe Biden arrived on an unannounced visit.
Iraq's Interior Ministry says the attacks appeared to be by members of al Qaeda and were related to an interfaith group that was trying to quell recent attacks against Christians in Iraq.
One of the explosions occurred in western Baghdad near a mosque where the interfaith group officials were meeting. Two people were wounded in that attack.
Another explosion killed one civilian and wounded four others outside a Shiite mosque in central Baghdad.
One more blast hit outside a Sunni mosque in northeastern Baghdad, wounding three people.
Another explosion was near a Sunni Shrine in central Baghdad, and killed one civilian and wounded five others.
Biden arrived in Iraq early Thursday to meet with top Iraqi government officials.
"I'm here to help the Iraqis celebrate the progress they made. They formed a government. And that's a good thing. They have a long way to go," Biden said.
Biden was scheduled to meet with Iraqi Prime Minister Nouri al-Maliki, former Prime Minister Ayad Allawi, President Jalal Talabani and other political leaders.
Biden appears to be touring the region. He was in Pakistan for an unannounced visit Wednesday and in Afghanistan Tuesday.