An explosion rocked the United Nations offices in the Nigerian capital, Abuja Friday morning inflicting heavy casualties. One report quoted a medical worker as saying there were ten dead and there could be more.A local hospital said sixty people have been brought in, many of them in a critical condition. According to Nigerian media, the explosion was suspected to be a suicide attack and about 300 UN personnel were trapped inside. Speaking at the scene, the Nigerian foreign minister said the bombing was an attack on the entire international community. No group has claimed responsibility for the attack.