A 19-year-old man free on $5,000 bail while awaiting trial on murder and attempted robbery charges was arrested yesterday at the Silver Spring Metro station after allegedly robbing a bank and holding a customer at gunpoint, Montgomery County police said.

Kodie Cotrell Kinzer was being held without bond last night at the Montgomery County jail on armed robbery, assault, kidnapping and handgun charges, police spokeswoman Anne Evans said.

Kinzer was charged in the July 4 shooting death of Anthony Williams, 20, who was killed in a struggle with robbers, one of whom posed as a mail carrier. In October, Kinzer was released on $5,000 bond by Circuit Judge William M. Cave.

Police suspect Kinzer as one of three men who robbed the First National Bank in Silver Spring about 11 a.m. yesterday. The robbers grabbed a customer entering the bank and placed a handgun to her head, Evans said. After the robbery, the men fled with an unknown amount of money, police said.

A short while later, a patrol officer observed a man fitting the description of one of the robbers boarding a subway train. Evans said police confiscated a .38-caliber pistol from Kinzer. Kinzer and codefendant Adrian Brockenberry are scheduled to be tried on the murder charge in February.