Updated

The death toll from the bombing of a passenger bus in Guatemala last week has risen to nine after a man died of his injuries at a hospital.

Roosevelt Hospital spokeswoman Berania Lopez says the 59-year-old man was among those in the bus when it was attacked Jan. 3.

The bombing occurred on a highway that connects downtown Guatemala City with the northwestern part of the capital.

Guatemalan authorities have arrested four members of the Mara 18 street gang, including a woman who police say left the bomb on the bus that was then detonated by cell phone.

Authorities say the gang attacked the bus to pressure bus drivers to pay extortion fees.