The Metro Bus service has also been suspendedProtesters in Lahore blocked Ferozepur Road in Lahore, near Chungi Amar Sidhu Sunday morning to protest against the killing of four people in Sahiwal. Their protest was stopped after news broke that an FIR had been registered against 16 CTD officials. The CTD gunned down on Saturday four people in a car in Sahiwal, including a woman and 13 year old girl. Three minor children were also in the car at the time of the incident.The police officials involved in the shooting have been arrested on the directives of Prime Minister Imran Khan.Related: CTD officials arrested for alleged involvement in fatal shooting of four people in SahiwalThe protesters set tyres on fire on Ferozepur Road and suspended operations of the Metro Bus service. The route from Kasur to Lahore was blocked.The protesters were waiting for the bodies of the four people to be brought to Lahore so that they could offer their funeral prayers. They only had one demand -- bring the people who killed the family to justice.