British police have arrested a 17-year-old boy, who wasn't named by media, on suspicion of malicious communications. The arrest resulted from a Twitter message sent to diver Tom Daley after he and his partner finished fourth in the men's synchronized diving at the Olympics. The message accused Daley of letting down his father, who died last year from cancer. The Twitter user later apologized at least twice. But someone reported his initial remark to police.