U.S. golfer Tiger Woods was fined for a spitting incident during the final round of the Dubai Desert Classic, according to foreign media reports Tuesday.

During the match, Woods was caught by cameras spitting on the course’s 12th green after missing a putt. The indecent behavior triggered outrage among golfing fans with the European Tour's website receiving dozens of complaints within minutes.

In response, European Tour has announced its fine decision on Monday but declined to disclose the detailed amount. Foreign media speculated it could be up to 10,000 Pounds (16,000 U.S. dollars).

Woods apologized the spitting incident on his Twitter Monday night. “The Euro Tour is right - it was inconsiderate to spit like that and I know better,” his tweet said, “Just wasn’t thinking and want to say I’m sorry.”

“Everyone was terrific all week, fans especially. Dubai is always a fantastic host. Just wish the week could have ended better,” he also said.