At about 9 a.m. officers were notified that a tower on Rocky Ridge, located west of San Ramon and Danville, had failed and collapsed during the night.
Officers responded to the scene and found that no injuries had occurred and that vandalism may have been involved in the incident.
The tower supports radio communications systems across the East Bay. All systems remain intact this morning, police said.
Police are continuing to investigate the cause of tower's collapse.
Damage is estimated to be more than $1 million.
Anyone with information regarding the incident is urged to contact police at (510) 881-1833.