Two suicide car bombs exploded seconds and a few hundred meters (yards) apart in a busy area of central Baghdad Thursday, killing at least 13 people, police and medical sources said.

Two suicide car bombs exploded seconds and a few hundred meters (yards) apart in a busy area of central Baghdad Thursday, killing at least 13 people, police and medical sources said.

The blasts went off in Karrada, a district packed with shops and restaurants, shortly after the time when people gather to break the fast observed during the Muslim holy month of Ramadan.

Earlier on Thursday, suicide bombers and gunmen attacked a bus transferring convicts from a prison north of Baghdad, sparking fierce clashes with security forces that left at least 60 dead, police said.

Security and medical officials said that around 50 prisoners were among the dead, many of them burnt beyond recognition. A number of policemen also died.
  
"At least 60 people, prisoners and policemen, were killed in a suicide attack followed by several IEDs (improvised explosive devices) and shooting," an interior ministry official told AFP.
  
It was not immediately clear who launched the assault, which targeted a security convoy escorting a bus that was transferring around 60 prisoners, many of them held on terrorism charges, from the main prison in Taji, some 25 kilometers (15 miles) north of Baghdad.
  
The attack took place hours before UN Secretary General Ban Ki-moon was to hold talks with Prime Minister Nuri al-Maliki in an effort to spur international mobilization against a terrorist insurgency.
  
It came a year almost to the day after terrorists attacked the same prison in Taji and another facility in Abu Ghraib, west of the capital, killing at least 20 members of the security forces. Officials said at the time that no inmates had escaped from Taji prison but 500 broke out of Abu Ghraib.