Jason Harnett, who lived next door to Bellevue School, has two boys aged 10 and 6 who attend the school.
"I went to school this morning and I heard one shot. It sounded like a gunshot but I thought someone must have banged into a car or something."
He said about 10 minutes later he heard a second gunshot and what he believed to be bullet shells hitting the roof of his house.
"To me straight away I knew it was a shotgun. I was a bit worried so I went down to the school and straight away I was told the school was on lockdown."
Mary Fives, Milly Fives' mother, said she got a text from a friend asking if she had received a call from Bellevue School about the lockdown.
She was stuck at work and started to worry about her child at the school.
Fives said when she picked up her daughter from school about lunchtime she had noticed a change in the pupils' behaviour during the break.
"They are all really quiet ... it is different."
A parent, who wanted to be called Dorne, said police had pulled up to Bellevue School during the lockdown and entered the grounds armed with "big guns".
She had been texting people who were inside the school during the lockdown and found a range of emotions from inside, from "'aw s***' to 'we're just chilling'."