Metro is reviewing its security procedures after a 15-year-old girl was beaten in the bus tunnel as security guards stood by and watched.

From King 5:

According to police reports, a group of teenagers approached a 15-year-old girl they knew inside Macy’s. The encounter turned antagonistic and moved on to the downtown Nordstrom. The group of 10 teenagers allegedly surrounded the girl and gave her a bad time about what she was wearing. According to police, one in the group threatened her by stating, “Bitch, I’ll kill you.”

The video shows the two girls hitting each other for a few seconds. Then, the scene gets vicious. The young attacker punches the victim in the head and face 10 times.

After the victim is punched, the attack gets worse. The suspect then kicks the girl’s face and stomps on her head six times. The guards make no attempt to get in the middle of the girls or to pull the attacker away. One guard is seen in the distance looking on. He never approaches the scene. Another guard turns his back on the assault. The third stands just inches from the girls, looking on.