Fel heddluoedd eraill ledled y Deyrnas Unedig, fe wnaeth yr heddlu yng Nghymru ymateb yn gyflym yn dilyn yr ymosodiadau, gan gynyddu nifer y patrols o gwmpas mosgiau i leddfu pryderon; gan gysylltu â chymunedau o bob ffydd a rhoi cyngor ar sut y gall pobl amddiffyn eu hunain a’r mannau o’u cwmpas. Nid yw heddluoedd yng Nghymru wedi cofnodi unrhyw fygythiadau uniongyrchol yn erbyn ein cymunedau Mwslimaidd. Er hynny, gall addoldai ddefnyddio’r pecyn hyfforddi ar-lein sef  ‘ACT Awareness eLearning’ i gael cyngor ynghylch Diogelwch Amddiffynnol a sut i ymateb petai’r gwaethaf yn digwydd. Dyma’r ddolen at y pecyn: https://www.gov.uk/government/news/act-awareness-elearning.
As with the other forces across the UK, the police in Wales acted swiftly following the attacks, stepping up reassurance patrols around mosques; increasing engagement with communities of all faiths and giving advice on how people can protect themselves and places.  The Welsh police forces have not reported any immediate threats towards our Muslim communities. However, places of worship can utilise the online training package ‘ACT Awareness eLearning’ for advice on Protective Security and how to react should the worst happen. It can be found atgov.uk/government/news/act-awareness-elearning.