(CNN) -- U.S. Senator John McCain arrived on an unannounced visit to Afghanistan on Thursday, a coalition spokeswoman told CNN.
The Arizona Republican is expected to meet with U.S. forces. He is a member of the Senate Armed Services Committee.
The Fourth of July visit comes as the United States prepares to draw down its forces in Afghanistan.
The NATO-led International Security Assistance Force plans to withdraw all international combat troops by the end of 2014 but to keep a residual force in the country to help train Afghans and carry out counterterrorism operations when needed. The size of that force remains under discussion.