• Leipheimer one of 11 riders to testify against Armstrong • 38-year-old placed on 'non-active status' by Omega Pharma

Levi Leipheimer, one of 11 men whose testimonies led to Lance Armstrong being stripped of seven Tour de France titles and banned from the sport for life for doping offences, has been placed on "non-active status" by his current team Omega Pharma-Quick-Step.

Leipheimer, a colleague of Armstrong's on the US Postal Service team between 2000 and 2001, was given a six-month suspension by the United States Anti-Doping Agency (Usada) for his role in the doping scandal at the team.

The 38-year-old will now be questioned by his current team, who said in a statement released on Wednesday night: "Following the information released by Usada regarding Levi Leipheimer, Omega Pharma-Quick-Step cycling team announces that the rider has been placed on non-active status.

"The team takes the decision of Usada and the consequent statement of Mr Leipheimer very seriously. The team wants to review and consider all the information now being made available and speak personally with the rider before a final decision is made.

"The team would like to point out that the battle against doping has always been a guiding principle of its activities and work ethic. The suspension imposed by the Usada refers to a period of time when the athlete was not part of Omega Pharma-Quick-Step Cycling Team."

Leipheimer, among four of the 11 who testified who are still competing, released a statement to the Wall Street Journal in which he confessed to doping but claimed to have been clean for over five years.

Leipheimer has been stripped of all race results between June 1999 and July 2006, as well as results during July 2007. He rode alongside Armstrong at US Postal from 2000 to 2001, at Astana in 2009 and RadioShack in 2010.

"I accept responsibility and Usada's sanctions for participating in the dirty past of cycling," Leipheimer's statement read. "I've been racing clean for more than five years in a changed and much cleaner sport.

"Until recently, when people thought about doping, they thought about a guy, by himself, using banned substances to get ahead. What people didn't realise – what I didn't realise until after I was already committed to this career – was that doping was organised and everywhere in the peloton. Doping wasn't the exception, it was the norm."