ALAMEDA -- After someone found what police are now calling a crude attempt at a homemade firecracker Wednesday morning, the county's bomb squad was called to Crab Cove and quickly detonated the object, police said.

No one was injured.

Lt. Ted Horlbeck said a 3-4 inch long plastic pill bottle that had tape wrapped around it and "something sticking out the end" was found shortly after 10 a.m. Wednesday at Crab Cove, a recreation area near Crown Memorial State Beach.

Alameda police received a call from East Bay Regional Park District staff, reporting that someone had found a device which was deemed to be possibly explosive at the southern end of Crab Cove in the 1200 block of McKay Avenue, police said. Horlbeck said police don't know if it contained anything explosive in nature.

Alameda police and fire crews responded to the scene along with personnel from the East Bay park police, the Department of Homeland Security, and the Alameda County Sheriff's Office, including the bomb squad.

Crab Cove is located within Crown beach and is a popular spot for picnics, walks, children's activities and nature viewing. The area was cleared while authorities worked, police said.

The case is under investigation by the East Bay Regional Park District Police Department, and it was not known last Wednesday who left the device in the Crab Cove area. No arrests had been made.

Contact Kristin J. Bender at kbender@bayareanewsgroup.com. Follow her at Twitter.com/kjbender.