A security guard allegedly inserted an iron rod into a six-year-old girl's private parts, causing her critical internal injuries.

Kaushal Anilsingh Chauhan, 24, a native of Uttar Pradesh, assaulted the six-year-old girl in Sola area in Ahmedabad by inserting an iron rod into her private parts on Friday, Sola police station inspector BV Gohil said.

Chauhan has been arrested.

The officer said Chauhan did not rape the minor but has been booked under IPC section 375 (d) (manipulating any part of the body of a child so as to cause penetration of the private part), as per the new anti-rape laws and under relevant sections of Protection of Children from Sexual Offences (POCSO) Act, 2012.

The incident took place when the girl was playing at an under-construction site near Sola over-bridge, he said.

According to preliminary investigation, there was some old rivalry between Chauhan, who worked as security guard at the site, with the girl's parents, who also worked there as labourers, said Gohil.

The girl has been sent to Sola civil hospital and her condition is stated to be stable, he added.