As I understand it, unlike haiku, senryu don’t have a cutting or seasonal word. The structure of senryu is usually three lines with 17 or fewer syllables (e.g. 5-7-5), like haiku. It addresses human issues/affairs rather than nature. (Emotions rather than the senses, maybe?) Also, a haiku length that is coming more into use is ~11 syllables (3-5-3), putting them more in sync with the content volume of a haiku written in Japanese.
I wrote this poem on 24 March during a Poetry Heals workshop online, but made a few changes and found a picture to support the mood. It was a reaction to the shootings that had/have been taking place recently.