Police in Huddersfield are treating three firearms discharges over the last week as linked.
The first incident occurred on Saturday 29 December on Scott Vale when a handgun was used to fire at a window of a house.
There were people inside the house at the time, but no-one was injured.
A 24-year-old male from Huddersfield was arrested in connection with the incident and has been released pending further investigation.
The second incident happened the next day, on Sunday 30 December on Birkby Hall Road, at around 2.50pm, when a shotgun was discharged close to a hairdressers and a 24-year-old man suffered serious but non-life threatening injuries to his back.
Three males aged 16, 17 and 19 were arrested and are currently on police bail.
The latest incident happened on Wednesday (2 January) at 5.40pm on Clara Street in Huddersfield when reports were made to the police of damage to a window.
Officers attended the scene and it was established that a shotgun was fired at a property whilst people were inside the house.
No-one was injured as a result of the incident and a 19-year-old male from Huddersfield was arrested shortly after.
Detective Chief Inspector Jaz Khan, of the Force Firearms Prevent Team, who is leading all three investigations, said: “We believe all three of these incidents that have happened in Huddersfield over the past week are linked.
“These were all targeted offences on individuals who are known to each other. The public will be undoubtedly concerned about this series of events, but I would like to reassure residents that we have significantly increased high visibility police patrols in the area and that these incidents are our highest priority.
“The use of firearms for criminal use is completely unacceptable and this will not be tolerated either in Kirklees or in West Yorkshire.
“We are taking a robust approach to this and as a Force using all tactical options available to tackle firearms incidents.
“We have made arrests in connection with each of these incidents, however, I would urge the public to come forward with any information, whether you have witnessed anything or have any information. I am particularly interested to hear from anyone who has information about the vehicles involved.”