Authorities say the Foothill Transit bus collided with the bicyclist on White Avenue and Chester Place at about 5:45 a.m. The 42-year-old victim was rushed to Pomona Valley Medical Center, where he was pronounced dead. His name has not been released.
Several passengers were on the bus at the time of the crash. They were loaded onto another bus and sent on their way.
Police were interviewing the bus driver and will be reviewing cameras to determine the cause of the crash.
White Avenue in the area was closed due to the investigation. Anyone with information is urged to call the Pomona Police Department Traffic Services Unit at (909) 620-2081.