The state prosecutor's office of Upper Austria announced on Tuesday that it had arrested a 45-year-old Linz woman on Sunday for armed robbery of at least two banks.

The woman has been admitted to the Wagner-Jauregg hospital for evaluation of possible mental health issues, they said.

The pensioner is suspected of having robbed a branch of the Raiffeisen bank in Linz Ebeldberg on July 4th of this year. She is also believed to have robbed a bank in Munich on August 26th, 2011.

In both cases, the perpetrator was wearing a scarf, dark sunglasses and was armed with a pistol, leading police to believe the same person was involved.

Through analysis of video recordings from the bank, as well as information supplied by a member of the public, police were able to track down the woman who was described by witnesses as older, overweight, 1.7 metres tall, wearing a distinctive white blouse with black polka dots, a blonde wig around which she had wrapped a bright headscarf, and dark sunglasses. 

Lengthy investigations corroborated the suspicion to the degree that the woman was finally arrested on Sunday.