4 arrested following fatal assault on Chinese graduate in LA

The Los Angeles Police Department announces Friday, July 25, 2014, that two suspects have been arrested in the killings of two Chinese graduate students studying at the University of Southern California (USC). [Photo: Xinhua]

Four teenagers have been arrested in connection with the murder of a Chinese student in Los Angeles.

Investigators say they believe the teenagers attacked Ji Xinran as he was walking to his off-campus apartment last week from a study-session at the University of Southern California.

The 24-year old graduate student in electrical engineering managed to walk back to his apartment and was found dead the next morning.

LAPD commander Andrew Smith.

"I don't know why a group of young people would go on a crime spree as terrible as this, as horrible as this, and do these kind of unspeakable things to someone who is just walking home at night."

It's believed the group, ranging in age from 16 to 19, robbed the 24-year old, then continued on with other robberies later that night.

A 14-year-old girl, arrested on suspicion of a separate robbery, is also believed to have a connection to the attack.