ALEPPO, Syria - Two car bombs detonated outside security bases in the Syrian city of Aleppo on Friday, officials said, killing 28 people in the worst violence to hit the country's northern commercial hub in an 11-month-old revolt against President Bashar al-Assad. State television showed blood, bodies and shattered concrete strewn across a street in front of a military intelligence building, and a crater several metres wide outside a security force base in the city. Officials said the blasts were caused by explosives packed in two white minibuses, similar to those used by Syrian security forces. They said the vicitms included soldiers, civilians and children. The explosions follow three suicide bombings in the capital Damascus in December and January which killed at least 70 people. Syria's government, blaming al Qaeda for at least some of those attacks, vowed an "iron-fist response". Aleppo had been spared most of the unrest roiling Syria since anti-Assad protests erupted in March, but it has seen increasing protests and violence in recent weeks. Reporters taken on a government-arranged visit to Aleppo saw a heavily armoured vehicle which had been tossed on its side by the force of one of the blasts. Windows in the five-storey intelligence building, about 50 metres (yards) from the site of the explosion, had been been blown out. A reporter on state television, in a live broadcast from outside the complex shortly after the bombs shook Aleppo, said at least one blast had been audible 20 km (12 miles) away.影视帝国 tomove.com.cnMAP