Passers-by spotted the body in the bushes around a cricket ground in the Gujarat city on April 6.
Sharma also said that photos and all available details of the deceased girl has been sent to all the Superintendent of Police (SPs) of the state to identify the victim. A reward of Rs 20,000 has been announced for anyone providing information about the girl or her family.
The body of the girl was from Pandesara in Surat.
Sharma said police were widening the scope of investigation beyond Gujarat.
The Kathua rape case, where an 8-year-old girl was kidnapped and gangraped over a period of 5 days while she was force-fed sedatives before she was finally killed, resulted in protests over the brutal treatment meted out to the young girl.
Ganesh Govekar, forensic head, Civil Hospital, told ANI, "The girl's body had 86 injury marks including on her private parts".
The Surat Police last week found the body of a 11-year-old girl with 86 injuries in a cricket ground in the Bhestan area. Her death was caused due to the fatal blows incurred on several parts of the body.
There is no denying the fact that Surat being PM Narendra Modi's home state Gujarat and BJP being at the helm of the state government, there is added pressure on the Surat Police.
In Kathua rape and murder case, police has charged nine including some senior police officers. As of now, the Surat Police are yet to find the identity of the girl and the culprits behind the barbaric incident. The report indicated that the girl was perhaps strangulated to death. Meanwhile, the police said that all efforts were being made to identify the girl. "We have taken a DNA sample for identification". The 08-year-old girl was held captive in a temple, sedated and gang-raped multiple times before being murdered by the accused.
As of now, an FIR has been lodged under Sections 302 (murder), 323 (voluntarily causing hurt) and 376 (rape) of the IPC and under POSCO (Protection of Children from Sexual Offences Act) against unidentified persons.
The rapes and murders in Kathua and Unnao on the other side have been sparked shock and indignation across the whole nation.