Police have received reports of a collision which is partially blocking a section of Leeds Ring Road this morning.
The force's customer contact centre issued a warning to drivers at 8am and advised finding an alternative route.
The collision between a car and a bus happened near the junction for Sainsbury's at the Moor Allerton Centre.
A police spokesman said initial reports from the scene suggested there had been no injuries.
First Bus has advised passengers that its 51 and 52 services are being diverted via King Lane, omitting the Moor Allerton stop and terminating at Park and Ride until further notice.