This is sad. 
Karachi Police has detained few people.
Violence erupts in Karachi
KARACHI: A sector office of the Sunni Tehrik and four houses including a shop and a private school were on Thursday ransacked and torched by unidentified miscreants in Orangi Sector 10-L in Mominabad police precinct, witnesses and fire brigade sources said.
Police said in the wake of 9th Muharram-ul-Haram a procession was passing from Awami Colony Sector 10-L. Witnesses said when it reached Mohajir Chowk near the sector office of the Sunni Tehrik, some unknown persons reportedly present inside the office pelted the procession with stones. Some reports suggested that a Sunni Tehrik activist was beaten by unknown people before the stones were thrown from the office.
The participants of the procession became enraged and some of them entered the office, ransacked and set it on fire. Police and rangers accompanying the procession called fire brigade, which reached the spot and started rescue work. Fire brigade sources said the office was partially torched.
In the meantime, police and rangers brought the situation under control and asked the Shia representatives to control the crowd and the procession started moving.
After the procession passed through Orangi Sector 10-L, police sources said, violence erupted in the area near Muhajir Chowk as unknown arsonists came on the streets and ransacked four houses (H-No 574, 575, 576 and 577) situated in a lane. They torched a school and a beauty parlour situated in the premises of two of the four houses and a motorcycle parked outside a house. The motorcycle (KCK-1641) belonged to Syed Imran Hussain.
Police said the properties belonged to Shia community. Unknown persons burnt tyres on the road and blocked the roads for vehicular traffic. Heavy contingents of police and rangers reached the scene and tried to control the situation. Police said the miscreants started hurling stones on the law enforcement personnel upon which the police lobbed tear-gas shells to disperse the crowd. After heavy shelling, police and rangers managed to nab more than dozen miscreants from the spot.
Witnesses said the participants of the procession, after getting word about of the attacks, staged a protest sit-in at the main road in front of Hussainia Imambargah in Orangi Sector 5. The Sindh Home Secretary, City Nazim Naimatullah Khan, Inspector General Police (IGP) Sindh Syed Kamal Shah and other senior officials reached the affected area to control the situation.
Talking to The News Sindh police chief Kamal Shah said: “Some people created a law and order situation in Mominabad police limits. They burnt tyres and ransacked an office and few houses there. However, no firearm was used in the incident and police used teargas to disperse the crowd.”
He said some policemen and passers-by sustained injuries owing to the stone-pelting by the miscreants. He said: “We have called the elders of Sunni Tehrik and representatives of Shia community to settle the dispute. Our first priority is to terminate the procession and we are trying to convince the Shia representatives.” Shia elders said the sit-in would continue and religious proceedings would continue at the scene well into the night.
Regarding any arrests from the area, he claimed that police have detained a few people involved in the violence. Kamal said the police and local administration called out army for a flag march in the area.