UPDATE: Cambridge police announced Wednesday night that Hermela Aklilu has been found.
Cambridge police are asking for the public’s help to locatea 16-year-old girl who has been missing since early Monday night.
Hermela Aklilu was last seen at her home on Walden Square Road and investigators later observed her on video surveillance near the Porter Square T stop at around 7:30 p.m., according to a statement from police.
Aklilu went missing three years ago but was located by Cambridge officers, the statement said. Officials say her family and friends are concerned she may try to harm herself.Globe correspondent Alana Levene contributed. Amanda Kaufman can be reached at email@example.com. Follow her on Twitter @amandakauf1.