The Bulgarian news agency BTA reports, citing AP, al-Chalabi has stated he was "happy to see the horror in America" and "American blood isn't more precious than Muslim blood."
The extremist leader has been sentenced to 7 year of jail for organizing attacks against western missions in Jordan in 2003. His organization is outlawed in the country.
A counterterrorism official based in Jordan has said the blasts carried the marks of an organized terrorist group like al-Qaida, but has not offered details and evidence.
Security measures for the US Embassy in Amman have been increased.