SEOUL — Americans should “exercise caution” during the Olympic torch relay through Seoul on Sunday, according to an e-mail sent to citizens registered with the State Department in South Korea.

The U.S. Embassy recommends postponing nonessential travel and using alternate routes Sunday afternoon.

The torch relay begins at 2 p.m. in Olympic Park. It is scheduled to arrive at Seoul City Hall by 7 p.m.

The specific route has not been announced and could change at the last minute due to security concerns, the State Department message said.

The message said several organizations might protest Chinese policy during the torch run.

“These demonstrations could escalate with little warning, further disrupting transportation systems and posing potential risks to bystanders’ personal safety,” the message said.

Protesters have gathered at torch relays throughout the world to criticize China’s policy toward Tibet. China considers Tibet one of its provinces; protesters say Tibet is an occupied nation.

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