The incident took place yesterday when the victim had gone to meet her boyfriend Sohail Shaikh at the house of Deepak Waghe (28).
Waghe is Sohail's friend, and she used to often meet Sohail at Waghe's place, said Virar police station's inspector Yunus Shaikh.
When she went there yesterday, Sohail was not there, and Waghe made an advance towards her which she resisted, he said.
Waghe, a vegetable vendor, then allegedly hacked her to death with an axe. The girl died and later in the day Waghe was arrested. Police had said that Sohail himself took Waghe to the police station.
According to police, Udayan claimed that he first met
Akanksha in 2007 and remained in contact with her on a social networking site.
He later changed his version, stating that the victim came to live with him in Bhopal after they became friends on Facebook last year, the officer said, adding that Udyan had a lavish lifestyle and used to travel in expensive cars.
"We have been verifying details. He would be produced in a court today," the police officer said.
She told her parents in a message that she was working in the US.
Suspecting her activities, the family traced the phone number through which she used to text and found that the number was registered on an address in Saket Nagar here.
Later, they lodged a complaint with Bankura police on January 5.
The West Bengal police kept an eye on Udyan's phone records and detained him after reaching Bhopal yesterday. He then spilled the beans during interrogation.