A 16-year-old Christchurch boy accused of an assault that left a woman in critical condition is now facing additional serious charges, police say.

The victim was found seriously injured at the Richmond Village Green on Stanmore Road on 5 February. The teenager was arrested and initially charged on 28 February.

Detective Senior Sergeant Karen Simmons confirmed that further charges were filed on Friday, relating to serious violent sexual offending.

“The accused appeared in the Christchurch Youth Court that day and has been remanded in custody,” Simmons said. “He is scheduled to reappear in early April.”

The victim, who suffered a significant head injury, is still undergoing treatment as she continues her recovery.

“We are continuing to provide her with support and update her about developments in this case,” Simmons said.

Police have acknowledged the assistance of the public in advancing the case.

“We would like to thank the members of the public who have come forward with information and allowed us to get to this point,” Simmons said.