The U.S. Embassy in Kabul warned on Monday of an imminent attack in the Afghan capital, saying it had received credible reports of a threat within the next two days, although it had no other details.State Department spokeswoman Elizabeth Trudeau told reporters the threat was not made specifically against the U.S. Embassy, U.S citizens or any American interests in Kabul."U.S. Embassy Kabul has received credible reports of an imminent attack in Kabul city, Kabul province, Afghanistan within the next 48 hours," the embassy said in a post on its website."During this period of heightened threat, the U.S. Embassy strongly urges U.S. citizens to exercise extreme caution if moving around the city. There were no further details regarding the targets, timing, or method of the planned attack," it said.The Taliban often carry out attacks in Kabul and elsewhere, mainly targeting Afghan security forces and foreigners. Supporters of Daesh have a growing presence in Afghanistan.The U.S. State Department has long warned against travel to Afghanistan, which has been mired in war for decades.