Authorities in Australia have arrested a man they say conspired with a convicted international arms dealer known as the "Merchant of Death."

Richard Ammar Chichakli, a U.S. and Syrian citizen, was arrested Wednesday by Australian authorities at the request of the United States, the U.S. Drug Enforcement Administration said Thursday.

The DEA alleges Chichakli once conspired with convicted arms dealer Viktor Bout to buy airplanes to illegally transport weapons to conflict zones.