Three teenage boys have been arrested after a grassfire was allegedly deliberately lit in Sydney's south-west.
The trio, two aged 15 and one 16, were detained on Sunday evening.
Authorities were alerted to a fire in the bush at Harrington Park about 5.30pm on Sunday by a passing driver.
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The fire was extinguished after about 45 minutes.
All three teens were taken to Narellan Police Station for questioning.
In the video below: Bushfire threat ramps up due to windy conditions
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Police say all are eligible to be dealt with under the Young Offender's Act.
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Mobile phones and other items were seized for forensic examination.
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