this is bbc news with the latest headlines for viewers in the uk and around the world. i'm shaun ley. british police open a terrorist investigation after three people were stabbed to death in a park in the centre of reading. a libyan man, khairi saadallah, was arrested nearby. he's understood to have come to the attention of security services last year. mental health is being considered a factor in the attack in which three people were killed and three others wounded. he stood up and i saw a massive knife in his hand, bubbly at least five inches minimum, and then he turned and started looking towards us, and that is when i started shouting, run!

in other news: germany's virus transmission has jumped. experts say meatpacking factories like this one are partly to blame. us president trump stages a comeback campaign rally in tulsa in oklahoma, his first in months, but fails to fill the arena. and in sport, liverpool and everton show their respect for black lives matter in their english premier league return.