this mosque and frequent this mosque have. recently the mosques in phoenix received threatening letters. specific threats. this is all happened within the last week. this adds to the intersection of islamaphobia and gun culture. when we see these, this is more of a concern. now people are saying maybe we shouldn t go over there. we are advising people from our organization it is better to stay clear from the event and don t engage. reporter: the folks on the islamic american relations said there was a threat this week. a written threat to the imam and the congregation. there is a bit of concern for those who come to the mosques, especially on friday a day of prayer. we can tell you there will be security. we know from the phoenix police itself and they have surveyed the area and they will be here during the rally. sara sidner in phoenix.