<div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>WA Police are investigating an incident on a Perth train during which an off-duty officer restrained a 13-year-old girl.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>CCTV from the train is being reviewed, which WA Police says is part of a standard process.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The Public Transport Authority's CCTV is being kept under wraps for now, however, there is vision circulating on social media that was recorded by the girl's friend.</span></div></div><div><div id="adspot-mobile-medium"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><span>READ MORE:</span></strong><span> </span><a href="https://www.9news.com.au/videos/national/bikie-arrested-outside-court-as-one-of-his-members-faces-trial/cmo2s476d00070gli4691lcs4"><strong><span>Bikie arrested outside court as one of his members faces trial</span></strong></a></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>The phone footage shows the off-duty officer restraining the 13-year-old on the ground, before pushing her onto a seat on Sunday about 4pm on the Yanchep Line.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>In the footage the girl's friends can be heard screaming "her head, her head" after the officer appears to pin the girl down at one point.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>Police today said the 13-year-old had allegedly assaulted the officer by punching him in the face after he intervened in a verbal altercation between two groups.</span></div></div><div><div class="OUTBRAIN" data-reactroot="" data-src="//www.9news.com.au/national/wa-police-investigate-after-after-off-duty-cop-restrains-teenage-girl-cctv-footage/300c9c11-25dd-4078-9084-1d1433c081ce" data-widget-id="AR_5"></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>While no formal complaint has been made by those involved, police are investigating the officer's conduct.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><span>However, he is still on operational duties during the investigation.</span></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><strong><em><span>NEVER MISS A STORY:</span></em></strong><span> </span><em><span>Get your breaking news and exclusive stories first by following us across all platforms.</span></em></div></div><div class="block-content"><div class="styles__Container-sc-1ylecsg-0 goULFa"><ul><li><strong><em><span>Download the 9NEWS App here via</span></em></strong><span> </span><a href="https://apps.apple.com/au/app/9news/id1010533727" target="_blank"><strong><em><span>Apple</span></em></strong></a><span> </span><strong><em><span>and</span></em></strong><span> </span><a href="https://play.google.com/store/apps/details?id=nineNewsAlerts.nine.com&amp;hl=en_AU&amp;pli=1" target="_blank"><strong><em><span>Google Play</span></em></strong></a></li><li><strong><em><span>Make 9News your preferred source on Google by</span></em></strong><span> </span><a href="https://9.nine.com.au/8x987w" target="_blank"><strong><em><span>ticking this box here</span></em></strong></a></li><li><strong><em><span>Sign up to</span></em></strong><span> </span><a href="https://login.nine.com.au/edm?client_id=nineatnine" target="_blank"><strong><em><span>our breaking newsletter here</span></em></strong></a></li></ul></div></div>