CHICHAWATNI (Online) - A man on Thursday allegedly killed his mother and four sisters in the name of honour in Chichawatni Tehsil of Sahiwal district, officials said. Local police said that the incident took place in wee hours of Thursday in Ghaziabad village near Chichawatni. "The killer first drugged the victims and then cut their throats to death with a sharp-edged tool." The four girls are said to be aged between 18 to 25 years. The police have started investigation after taking the bodies into custody for legal formalities. It is to be noted that honour killing is common practice in the country where many women have been killed in the name Karo-Kari or Vani.