Definition: Generate an appropriate title for the given text. The generated title must be short and include the main topic of the text. The preferred titles are under fifteen words.
Input: Heavily armed police officers were deployed to the scene in the Kreuzberg district, German media report. The four injured were aged between 30 and 42. One man was pulled from the Landwehr canal, reportedly with a gunshot wound to the leg. The city's attorney general said the incident could have been carried out by members of rival organised crime gangs. A murder investigation team has taken over the investigation. According to a police statement, residents alerted authorities shortly before 04:00 local time (03:00 GMT) after hearing gunfire. The injured - all men - were taken to hospital. Photographs from the scene show gunshot damage to a doorway of a building opposite the headquarters of the Social Democratic Party (SPD). Police said they did not know how many perpetrators might be involved.

Berlin shooting: Several injured in Kreuzberg