'I feel strongly that this is a time to pause, reflect and remember the victims of Tuesday's horrific attack,' the statement on tigerwoods.com read.
'I have always felt that I must be fully committed to each and every golf competition I enter, but due to this week's events, I am not,' Woods said. 'I also fear that the security risks of traveling overseas at the present time are too great.'
Meanwhile, the European Tour has agreed to allow all members of the Ryder Cup teams to file late entries into the event following the cancellation of this week's WGC-American Express Championship in St Louis.
Tiger's withdrawal is expected to be followed by others who have expressed concern about travel safety.
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