A knife-wielding suspect briefly took a pregnant woman hostage Tuesday morning before quickly surrendering to officers in a failed downtown Hayward bank robbery, police said.
No injuries were reported.
The man gave a note to a teller about 11:30 a.m. at the Wells Fargo Bank at 1172 A St., near Second Street, and told everyone to drop to the ground, Lt. Roger Keener said.
The suspect then yelled that he was going to "blow things up" at the bank, police said.
Tellers hit the silent alarm button, and several customers who ran out of the bank called 911, Keener said.
Two plainclothes police detectives, in the area on an unrelated case, arrived and peered into the bank windows, seeing customers and employees lying facedown on the ground, Keener said.
Police said they also saw the suspect hold a knife to the upper body of a pregnant woman he had taken hostage.
The detectives, one of whom is a crisis negotiator, entered the bank with their guns drawn and ordered him to let the woman go.
The hostage then told him, "I have a baby, I have baby," according to a person inside the bank who declined to be identified.
Moments later, the detectives convinced the suspect to let the woman go, and he then surrendered, Keener said.
He was arrested on suspicion of armed robbery and assault with a deadly weapon, police said.
Authorities did not release the man's name Tuesday evening because his identity had not been confirmed through fingerprint tests, Keener said.
Hayward fire paramedics checked the pregnant woman, who reported no injuries and was released.
While the suspect sat handcuffed in the back of a patrol car, a dog from the Alameda County Sheriff's Office bomb squad was taken inside the bank to check for any explosives. None was found, Keener said.
The bank was closed for most of the day as investigators interviewed about 20 branch employees in the parking lot bordered by busy Russell and A streets -- which were closed briefly during the police action.
Staff writer Rob Dennis contributed to this report. Contact Chris De Benedetti at 510-353-7011. Follow him at Twitter.com/cdebenedetti.