Kingston: Jamaican sprinter Steve Mullings might be banned for life after being found guilty of using the banned substance furosemide.

Mullings' urine sample was found positive of diuretic, which can serve as a masking agent for other drugs, after he came in third in the 100-meter final at the Jamaican National Trials on June 24.

"We have listened to the evidence in the hearing for the past two weeks and we have considered the depositions carefully," Lennox Gayle, head of a three-man disciplinary panel, said on Thursday. "It is a unanimous verdict that Mr. Mullings is guilty of having furosemide in both his A and B samples," a newspaper reported.

Mullings had in 2004 been banned for two years after he tested positive for elevated levels of testosterone at the Jamaican championships.

Under IAAF rules, an athlete who receives a second ban for a prohibitive substance will be banned for life from taking part in the sport.

The 28-year-old sprinter said he would appeal to the Court of Arbitration in Sports.