Denver police are investigating two separate crashes involving pedestrians struck by drivers that happened just about 12 hours apart.

The Denver Police Department tweeted Monday morning that officers were investigating an “auto v pedestrian” crash with serious injuries at 15th and Champa streets downtown. No details about the pedestrian’s condition were available.

On Sunday night, the police tweeted that officers were on the scene of an “auto vs pedestrian” crash in the 3600 block of Blake Street in Five Points. A spokesperson said the pedestrian was taken to the hospital with serious but not life-threatening injuries. An investigation will determine whether charges will be filed. The driver stayed on the scene.

Last month, police announced they had added nine officers to its traffic beat to beef up enforcement in high-crash areas. The plan aligns with the city’s Vision Zero campaign, which seeks to lower the number of traffic deaths in the city.