SAN JOSE -- Police are asking for the public's help in identifying a suspect in the robbery of five banks in San Jose and Milpitas over the past eight weeks.

The most recent robbery happened at 2:22 p.m. Monday at a Comerica Bank in Milpitas, according to police.

San Jose police on Tuesday released several images of the robber who appears to be a woman wearing different wigs in the string of robberies -- three in Milpitas and two in San Jose. But police said the robber could be a man dressed as a woman.

In each case, the robber enters the bank, hands a teller a demand note and either makes threats or brandishes a handgun, police said. The ¿robber has made off with an undisclosed amount of money.

The robber is becoming progressively more brazen and should be considered armed and dangerous, police said.

The robberies occurred at two Milpitas branches of Wells Fargo at 139 Ranch Drive on Nov. 9 and 1715 Landess Ave. on Dec. 30 and one at 1705 North First St. in San Jose on Nov. 23, a Bank of America at 1245 Lincoln Ave. in San Jose on Dec. 11 and a Comerica Bank at 1289 South Park Victoria Drive in Milpitas on Monday.

Persons with information regarding these incidents are urged to contact detective Enrique Garcia of the San Jose Police Department's Robbery Unit at 408-277-4166. Persons wishing to provide information anonymously may call Silicon Valley Crime Stoppers at 408-947-STOP (7867) or may visit www.tipsubmit.org and may be eligible for a reward.

Also, an additional reward of up to $10,000 dollars (up to $5,000 from Wells Fargo and up to $5,000 from Bank of America) is being offered for the "identification and conviction of the suspect(s) associated with these robberies."

Contact Mark Gomez at 408-920-5869. Follow him on Twitter @MarkMgomez.