A US-wide manhunt has been launched for an Oxford University employee accused of stabbing to death a hair stylist in Chicago.

Police put out an all points bulletin for Andrew Warren, 56, a senior treasury assistant at Oxford's Somerville College, warning that he and an alleged accomplice were "armed and dangerous," and officers were told to use "extreme caution" if they were sighted.

The pair were last seen driving a rented grey 2017 Hyundai car.

Warren's fellow suspect was named as Wyndham Lathem, 42, an expert researcher of the bubonic plague, and an associate professor of microbiology and immunology a Northwestern University in Chicago.

They were accused of killing Trenton Cornell-Duranleau, 26 and, according to a court-issued warrant, they allegedly "stabbed him multiple times thereby causing the death".