New Delhi: Two-year-old Falak, who has been battling for life after being battered by a teenage girl, has been put back on ventilator as she developed breathing problems, All India Institute of Medical Sciences (AIIMS) doctors said on Sunday.

"She had breathing problems since on Saturday night. We put her back on ventilator support. We are constantly monitoring her condition," Deepak Agrawal, assistant professor, neurosurgery, at the AIIMS Trauma Centre said.

Falak was taken off the ventilator early on Friday. According to the team of doctors monitoring her condition, though her vital parameters are stable she is still critical.

"She is still critical as the culture test report had indicated that she has infection in her blood, brain fluid and chest," Agrawal said.

"For the past six days we are administering strong antibiotics. We will continue this for two to three days and see how she responds. If the infection worsens, we might go for another surgery," he added.

Falak was brought to AIIMS January 18, with severe head injuries and bite marks all over her face, by a 14-year-old girl who is now in a juvenile home.

Battling chest, brain and blood infections, she is being fed through a tube. Four people have been arrested in the case.