Banned militant outfit the Islamic State (IS) said the attacker who injured 11 people on Ohio State University (OSU) campus was a "soldier of the Islamic State", media reports said.
The attacker carried out the operation in response to calls to target citizens of international coalition countries, the self-fashioned caliphate said in an online message.
The group recently released a video on Tuesday calling on attacks on the West and demonstrated how to kill people with knives, Xinhua news agency reported.
It is unclear if the group had any ties with the attacker, identified by local police as Abdul Artan, an 18-year-old OSU student who moved to the United States from Somalia.
Artan was shot and killed by police shortly after he drove a car into pedestrians and started attacking people with a butcher knife on Monday.
The IS, which operates mainly in Syria and Iraq, is considered a terrorist group by the US government. It is known to claim responsibilities to violent attacks as a propaganda method to forward its ideology, exert influence, and attract potential followers.
11 people were injured on Monday morning in an apparent shooting incident at the campus of Ohio State University.
The shooter, Abdul Razak Ali Artan, was later killed. He was also a university student, whose family immigrated from Somalia, rammed his car into a crowd at university yesterday and attacked them with a butcher knife.
Terror groups like al-Qaeda and Islamic State have called upon their supporters to carry out attacks by driving vehicles into people or using knives, tactics that do not require elaborate preparation or equipment or networks.