CAIRO -- The man who stabbed an American academic near the U.S. Embassy in Cairo on Thursday admitted to the crime and said he committed it "to seek revenge over U.S. policies in the Middle East," the embassy said in a Friday statement that cited police sources.
"The perpetrator carried out the attack after establishing his victim to be a U.S. citizen," the statement said.
Christopher Stone, a fellow at the American Research Center in Egypt, was attacked outside the perimeter of the building about noon local time (3 a.m. ET) on Thursday, embassy officials said.
Stone was recovering from the attack and expected to be released from a hospital "in the next day or so," the embassy said.
The suspect, whose name has not been released, was arrested quickly after the attack and held on suspicion of attempted murder.
"The investigation, while still ongoing, has established that the perpetrator acted alone, and the incident was not tied to any larger conspiracy," the embassy said.
Embassy officials said they were monitoring the investigation and had asked police to increase their presence around the building.
Prosecutors said Thursday that Stone told them he had gone to the embassy to finish some paperwork for his wife when he was challenged by a young man who asked him twice about his nationality.
The suspect, who is unemployed, then stabbed him in the neck, prosecutors said.
Stone, a Princeton graduate, is associate professor of Arabic and head of the Arabic Program at the City University of New York's Hunter College, according to a biography on the college website.