A U.S. Customs and Border Protection Officer shot and killed a man crossing into the U.S. from Mexico Wednesday, officials said.
The shooting happened around midnight at the Calexico West Port of Entry south of El Centro, California.
A man on a bike was in one of the SENTRI vehicle lanes when he got off the bike and approached the officer, according to the CBP.
"As the subject approached the primary booth on his bike, the officer stopped the bike’s forward movement by reaching out and securing the subject’s left forearm," said CBP spokesperson Jackie Wasiluk.
The man got off the bike carrying an eight-inch knife, she added.
Wasiluk said the CBP officer drew his firearm and stepped away from the cyclist but that the man moved toward the officer.
The agency said the officer fired his gun four times striking the man in his chest and possibly in his neck.
Despite first aid administered by other CBP officers, the 35-year-old Mexican national was pronounced dead at a nearby hospital.
The officer, a seven-year veteran of the CBP, was not injured.
Pete Flores, the agency's San Diego field office director, told the Associated Press the man was not permitted to enter the United States.
The U.S. Department of Homeland Security's Office of Inspector General, the Calexico Police Department and CBP are investigating the incident, according to CBP officials.
Last year, more than 4.5 million pedestrians used the Calexico Port of Entry, making it the third busiest U.S. Border crossing for pedestrian traffic according to U.S. Department of Transportation Data.