I think “feared” in this context means they think it happened but have no proof of it. > We are living in a extremely heightened state of alert and security I

I think “feared” in this context means they think it happened but have no proof of it. > We are living in a extremely heightened state of alert and security I recommend that you take deep breaths. There are many worrying things but none of them will be better handled by panicking over them.