Police have apologised to residents after sounding sirens - to settle a debate about whether "they go nee-nah or woo-woo".
The sirens were used during a talk given by police community support officers (PCSOs) to pupils at Haydonleigh Primary School in Swindon, Wiltshire.
North Swindon Police said the PCSOs were holding a "People Who Help Us" session with three classes from the reception year on Wednesday morning.
"Apologies to anyone in the Haydonleigh area who may have been disturbed by our sirens yesterday morning - the PCSOs were at the Primary School having a very important debate with the new Reception Year children about whether they go nee-nah or woo-woo," North Swindon Police said in a post on Facebook.
"Our thanks to the teachers and pupils from the Robins, Puffins and Duckling classes for being so attentive to our 'People Who Help Us' talk, we were very impressed by your beautiful behaviour, thoughtful questions and knowledge about the police.
"We especially liked the suggestion that we should have police rhinos, and will be looking into the possibility of training them to knock down the 'baddies' front doors."