New York: Four-time Jamaican Olympian Raymond Stewart, who later became a coach in the United States, has been banned for life from athletics for acquiring banned performance-enhancing drugs for his athletes.

The United States Anti-Doping Agency (USADA) suspended Stewart after an arbitrator determined the coach had secured banned drugs from a supplier for athletes he coached and trained, the agency said on its website (www.usantidoping.org) on Monday.

"Stewart's participation in trafficking in prohibited substances, as well as administration and attempted administration of prohibited substances, in violation of applicable sport anti-doping rules," had led to the ban, USADA said in a statement.

Stewart worked with banned US sprinter Jerome Young, Americans Kenny Burkenburr and J.J. Johnson and Jamaican Olympian Beverly McDonald, according to the arbitrator.

"Violating the sacred responsibility and standards of a coach by aiding athletes with doping is truly reprehensible," USADA chief executive Travis Tygart said.

Stewart, a former sprinter, won a silver medal with Jamaica's 4x100 metres relay team at the 1984 Olympics.