"Undated handout photo issued by Tell MAMA of a letter advertising ""Punish a Muslim Day"". Police are investigating a possible hate crime after reports that anti-Islamic letters were posted across the country. PRESS ASSOCIATION Photo. Issue date: Saturday March 10, 2018. See PA story POLICE Letters. Photo credit should read: Tell MAMA/PA Wire NOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder."