An independent police watchdog is investigating events surrounding the shooting of a man outside a school.
A neighbour said they heard four shots being fired
Armed police were called to Burnthill Lane, Rugeley, Staffordshire, on Friday to reports that a 40-year-old man was allegedly waiting in a car with a gun.
Staffordshire Police said the man was shot in the hand and that no-one else was injured. A man was later arrested on suspicion of making threats to kill.
The Independent Police Complaints Commission has begun an inquiry.
The watchdog always investigates an incident when police injure a member of the public.
The wounded man remains seriously ill in Staffordshire General Hospital. His injuries are not thought to be life-threatening.
The IPCC said police were called to the scene following "domestic-related incidents" involving the man.
Len Jackson, IPCC Commissioner said: "Our investigation will seek to establish what actions were taken by all involved in yesterday's events.
"We will look at whether the procedures followed were in line with the policy and procedures of Staffordshire Police."
One resident, who was in the his back garden at the time of the shooting, told BBC News he heard four shots being fired and then a lot of shouting.
Another neighbour said she believed the incident involved a man arguing with his estranged wife over their young children.
She said: "All we know is there was a woman and her estranged husband and their children, and the father's been shot."
The woman said the children were aged about eight or nine and their mother was in her 30s.
She added: "They did live in the road as a family but they've all moved on now. I got the impression they've been separated for some time."
She said the school was closed for the summer holidays and there were no children there.