"She is a brave girl. She came out of the canal and approached a nearby fuel station from where a rescue team rushed her to hospital," he said.
Authorities raided her father’s home in the nearby city of Gujranwala but said all of the suspects had disappeared, Mr Akbar added.
In May, Ms Parveen was killed by her relatives because she married a man against their wishes. She was attacked in broad daylight in Lahore before a crowd of onlookers by 20 members of her family. Her father surrendered after the incident and called the murder an "honor killing", according to police.
The Human Rights Commission of Pakistan, a private group, said in a report last month that some 869 women were murdered in honor killings in 2013. The real number may be far higher, as in many cases the family will not step forward and protect the victim.
By Heather Saul
