Police now believe a man committed suicide, in the street in front of a Clayton elementary school this morning.
The discovery of his body prompted the cancellation of classes for the day, police said.
Officers went to Mt. Diablo Elementary School at 5880 Mt. Zion Drive around 5:30 a.m. on a report of man down.
Police found the body of a man in the crosswalk directly in front of the school and cordoned off the area. They are treating the death as a possible homicide, police said.
Police remained in the area around 8:50 a.m. investigating the incident.
Classes at the school are canceled for the day.