A man has killed his pregnant teenage sister in south Lebanon in what was seen as an honor crime - the murder of a woman accused of shaming her family.

Voice of Lebanon radio (100.5) said Friday that the body of Baghdad Khaled al-Issa, 18, was found with stab wounds in her head and sides in the area of al-Wazzani.

Investigators discovered that her brother Jihad, 21, had killed her in what is described as an honor crime, VDL said.

It added that the victim was seven months pregnant.

Later on Friday, LBCI television reported that the investigation with Jihad revealed that he had raped his sister, which lead to her pregnancy.

"He confessed to raping his sister,” LBCI said, adding that Jihad claimed he was drunk when the incident happened.

The television channel added that he had only recently found out about the pregnancy and asked his sister to undergo an abortion, but she refused.

Every year thousands of women are killed for notions of family honor worldwide, mainly in the Middle East, North Africa and South Asia.

In 2011, the Lebanese parliament approved a draft-law to cancel article 562 of the penal code that calls for limited punishments for honor killings.