The Miami-Dade bus driver who police said shot and killed two passengers on Sunday has been placed on administrative leave, according to a Miami-Dade Transit spokesperson.

A Miami-Dade bus driver is accused of opening fire on a public transit bus and shooting two passengers dead after an argument, according to reports. On Sunday, at around 3 a.m. local time, two male passengers were involved in an argument when the bus driver opened fire, according to local news outlets CBS Miami and Local 10 News.

Miami passengers are not allowed to bring bikes on board buses, but must instead use the bike rack on the front of each bus. When the man threatened the driver and reached into his bag, the driver allegedly drew his gun and fired six times, hitting both the man with the bike and another passenger who was not involved in the dispute.