The FBI has launched a terror probe into a weekend stabbing in Virginia — which may have been an ISIS-inspired beheading attempt, according to a report.

Wasil Farooqui of Roanoke County allegedly stabbed a man and a woman with a knife Saturday evening as they were entering an apartment building in Roanoke, police said.

Authorities believe Farooqui, 20, may have been trying to decapitate the male victim, whom he likely targeted at random at The Pines Apartments, sources told ABC News.

He shouted “Allahu akbar” — Arabic for “God is great” — during the assault, but was fought off by the man, officials said.

He was arrested later when he sought treatment at the same hospital where the victims were taken, the Washington Post reported.

“Both were attacked with a knife and severely injured,” Roanoke police said in a statement about the victims, who identified the suspect to cops.

The victims were identified as Karih Rezai and Taramati Harold, The Roanoke Times reported.

The feds have had Farrooqui on their radar for a while, ABC News reported. He has traveled to Turkey in the past year and may also have tried to enter Syria, where ISIS is recruiting jihadists, the network reported.

A US intelligence official told CBS News that Farooqui was believed to be self-radicalized.

Adam Lee, special agent in charge of the FBI’s Richmond field office, said in a statement that the agency is involved in the probe.

“While I cannot discuss details of the investigation at this time, I do want to reassure the community that we are working to determine the nature of the incident,” he said.

Farooqui is charged with two counts of aggravated malicious wounding and is being held without bond at the Western Virginia Regional Jail.