Buffalo shooting: gunman ‘plotted attack for months’

Online posts apparently by 18-year-old suspect Payton Gendron indicate previous visit to site where 10 Black people were killed

The white gunman accused of the massacre of 10 Black people at a Buffalo supermarket wrote as far back as November about staging a livestreamed attack on African Americans. He also practised shooting from his car and travelled hours from his home to scout out the store in March, according to detailed diary entries he appears to have posted online.

The author of the diary posted hand-drawn maps of the grocery store along with tallies of the number of Black people he counted there, and recounted how a Black security guard at the supermarket confronted him that day to ask what he was up to. A Black security guard was among the dead in Saturday's rampage.