The woman died en route to hospital after being walloped by Yallapa who was later detained for interrogation.
"She collapsed to the ground after being hit by Yallapa and was declared dead on arrival at Rajawadi Hospital in Ghatkopar," he said.
Senior Inspector Nitin Bobade of Mankhurd police station told new agency PTI that an accidental death report (ADR) has been registered.
"We are awaiting the post mortem report after which further action will be taken. Yallapa has been detained and further probe is underway," Bobade said.