SAN LEANDRO -- A man and three juveniles accused of robbing two young brothers in San Leandro and carjacking another person in Oakland were nabbed by police following a chase in which a police dog bit an innocent bystander.

Police say that about 7:20 p.m. on Wednesday, two male juvenile siblings were walking south along the 900 block of Bancroft Avenue when a person with a gun robbed them of their cellphones.

The victims dialed 911 and told officers the suspect who robbed them ran to a getaway vehicle which drove off toward Oakland, said Lt. Randy Brandt. The victims also gave police a detailed description of the suspect and his getaway vehicle.

About 10 minutes later a detective spotted the suspect vehicle driving in Oakland along the San Leandro border. A records check revealed the vehicle had been stolen during a carjacking in Oakland earlier in the day, Brandt said.

Officers attempted to stop the car, which took off. During the chase the suspect vehicle rammed a police patrol cruiser, but the officer in the cruiser was not injured, Brandt said.

As the vehicle sped off, it struck a second vehicle on Bancroft Avenue, near 90th Avenue. At that point, the driver and one of the passengers ditched the vehicle and ran off. The passenger was caught and detained but the driver -- also the suspect in the San Leandro robbery -- got away.

The driver ran past an innocent bystander, and a police dog chasing them bit the bystander, Brandt said. That person suffered a puncture wound to the arm, but was expected to recover.

Two additional passengers who remained in the suspect vehicle were detained. The three suspects apprehended were arrested on suspicion of being in possession of a stolen vehicle.

Thursday morning, detectives found the fourth suspect in unincorporated San Leandro and arrested him on suspicion of robbery, carjacking, felony evading and assaulting a police officer. Police have not released the identity of the driver, citing a continuing investigation.

Anyone with information about this case is asked to call police at 510-577-3230 or the Anonymous Tip Line at 510-577-3278. Citizens can also send an anonymous tip to police by texting the word SLPD and the tip to 88777.

Contact Natalie Neysa Alund at 510-293-2469. Follow her at Twitter.com/nataliealund.