(Reuters) – Officials said that a Drug Enforcement Administration agent (DEA) was shot to death and two additional law enforcement officers were wounded in a shootout aboard an Amtrak train.

A second suspect died from the gunshot wounds. One suspect was taken into custody, while the other one was killed in the attack. The incident occurred in Tucson’s downtown transportation hub. It happened during an officer with the regional drug task force conducted a routine check. Chief Chris Magnus, Tucson Police Department Chief told a news conference.

He said that neither the train passengers nor any bystanders sustained injuries during the incident.

Magnus said, “It is just incredible there weren’t any other people being hurt.”

Officials did not name the DEA agent that was shot and killed during the incident. Officials said the victim was a DEA Agent and another officer of the Tucson Police Department.

Magnus stated that officers got in touch with two people on Monday’s second floor of the double-decker Amtrak car as they boarded the train.

One suspect was detained and a second one pulled out a gun to open fire at law enforcement. After being detained, the second suspect pulled a handgun and opened fire on law enforcement. The chief stated that the victim was eventually found dead inside one of the cars’ bathrooms.