Presenting the fake ID, Buela M Sam from Ahmedabad stayed at the ISRO Satellite Centre guest-house at Jeevanbheema Nagar here for two days from September 19.
Two days later, she also gained entry into the high- security "Anthariksh Bhavan", the ISRO headquarters, they said.
ISRO sources said she may not have swiped her card to enter as requried. In all probability, she may have just waved her card to the Central Industrial Security Force (CISF) personnel, who apparently allowed her in around 11 am on September 21.
She roamed around in the building premises for four hours before some ISRO staff grew suspicious and reported the matter to the security, they said.
"Her behaviour was inconsistent. She behaved like a mentally ill person. Only an inquiry will reveal if she is actually mentally ill or she was pretending", an ISRO official said.
CISF personnel questioned her but her answers were totally inconsistent. Intelligence bureau sleuths questioned her the next day but could not get consistent response from her.
Also Read
Her fake card said she worked at "ISRO Mangalore", while the space agency has no unit there.
Inquiries revealed that that she is from Ahmedabad, from where her husband, Alexander, was summoned and questioned. During interrogation, he claimed that his wife is "mentally ill" and the family was unaware that she had travelled to Bangalore, the sources said.
Key question as to how she gained entry using a fake card remains unanswered. A case was registered at Jeevanbheema Nagar police station. Buela has been remanded to judicial custody till October six. An enquiry is in progress.
An ISRO official denied that an important meeting was taking place at ISRO headquaters when she intruded. (MORE)