The United States has not changed its "security posture" on Egypt, state department spokesperson Jen Psaki has said.
"We're continuing to monitor developments, and Egypt will calibrate our security posture in accordance with the security situation on the ground," Psaki said at a daily press briefing on Monday.
A security message issued on Thursday recommended that US embassy staff limit their movements to near their homes "over the coming period" and avoid places where protests occur.
It mentioned "heightened tensions and recent attacks on Westerners in the region" as well as reported clashes at universities and elsewhere in Cairo.
A number of diplomatic missions in Egypt have closed their doors or updated their travel advice over the past few days, citing security concerns.
Terrorist attacks have targeted army and police personnel mainly in North Sinai, but violence has also spilled over into Cairo and the Nile Delta.
The last terrorist attack against tourists in Egypt took place in February, when unknown assailants targeted a tourist bus in the Red Sea resort town of Taba, killing three Korean tourists and their Egyptian bus driver.
Many Western countries imposed travel warnings to Egypt at the time, but most warnings were lifted over the summer.