Delhi Police yesterday claimed to have traced the sister of battered baby Falak, who is fighting for survival at All India Institute of Medical Science, in Bihar.

"Falak's sister was found in Muzaffarpur in Bihar yesterday (Monday). The team which was sent to Bihar traced the three-and-a-half-year-old girl and she will be brought to Delhi today (Tuesday)," a senior police officer said.

According to police, they tracked down the Falak's sister after a detailed interrogation of Laxmi, who allegedly tricked Munni, who claims to be their mother, into a second marriage.

A day earlier, police said they had found 22-year-old woman Munni in Rajasthan and brought her to Delhi. MunniĀ -- who is also being treated as a victim in the caseĀ -- claims to have abandoned Falak in September last year.

Meanwhile, Falak is still critical and fighting for life.