30-year-old Landon Sims has no idea why a gang of about a dozen teenagers randomly attacked him outside the Richmond BART station last week. Robbery was not the apparent motive because, as he tells CBS 5, "They didn't take anything." He wonders whether this was some kind of gang initiation, because he had no interaction with the boys who attacked him and did not know them.

Sims says the teens encircled him and beat him up, repeatedly kicking him for six to ten minutes.

The incident happened Thursday morning at 11 a.m. when Sims was on his way to visit his grandparents, having just gotten off of work. The attack, as reported last week, was witnessed by Richmond Mayor Tom Butt, who was on his way to San Francisco via BART that morning and who called 911 after hearing screaming and seeing Sims kicked in the head — and seeing several teens taking video of the attack. Butt spoke out about the incident because he was frustrated by the fact that the Richmond Police Department told him to call BART Police, saying this was their jurisdiction, and then BART Police bounced him back to the RPD because the attack was not technically on BART property. Butt also snapped a photo of BART employees sitting in a truck nearby who "appeared uninterested" in what was going on.

Sims currently can't see out of his right eye, and he tells CBS 5 of his possible concussion "It’s like a pain in my brain, all over this side."

Sims also spoke to KRON 4, saying, "It’s hard, man, looking in the mirror every day knowing this has happened to me and I’m just trying to do the right thing in life and just be a working man and take care of my kids."

The incident comes after several months of multiple reports of rising crime on BART, in particular crimes involving gangs of teenagers.

The juveniles in question have not been apprehended.

Related: Richmond Mayor Witnesses BART Attack, Calls Out Nearby Workers As 'Uninterested'