A multi-vehicle collision at Market and 8th streets injured multiple people on Wednesday morning, including an on-duty San Francisco motorcycle police officer, said authorities.

Multi-vehicle Collision

The crash occurred at around 11:00 a.m., the San Francisco Police Department (SFPD) said. Cars were bunched up together at the intersection of Market and 8th, including a police on his motorcycle.

On its Twitter accounts, the SFPD advised residents to avoid the area due to the incident. Authorities are currently investigating to determine the cause of the crash. Police said they transported four people to the hospital, including one officer.

As of Wednesday, the conditions of the victims were unclear. However, they revealed the police officer involved in the incident suffered non-life-threatening injuries, CBS Local reported.