A Canadian tourist was killed and 13 other people were injured — including several Americans — after a crazed gunman held a group hostage atop a pyramid at Mexico’s famous Teotihuacan ruins on Monday morning.

The gunman climbed halfway up the Pyramid of the Moon — a nearly 2,000-year-old structure that was once used for ritual human sacrifice — just after 11:30 a.m. and opened fire on his cowering victims before finally turning the gun on himself, Mexican authorities said.

The shooter was identified as Julio Cesar Jasso, 27, of Mexico, a state official told the Associated Press on the condition of anonymity. He died of a self-inflicted gunshot wound at the scene, where security officers recovered a gun, knife and ammunition.

One Canadian woman was killed in the shooting, Mexican officials said.

Of the 13 wounded, seven people were shot, the officials added. The injuries of the other victims were not disclosed, but the gunfire caused a chaotic scene at the busy tourist attraction, as terrified sightseers leaped off the pyramid and ran for their lives.

Six Americans, three Colombians, one Russian, two Brazilians and one Canadian were taken to the hospital. The youngest person injured was 6 and the oldest was 61, authorities said.

Mexican President Claudia Sheinbaum wrote on X that she has been in touch with the Canadian Embassy and that she has instructed Mexico’s security cabinet to “thoroughly investigate” the incident. 

Videos posted on social media show Jasso, wearing a black mask and holding a handgun, pacing around the platform as trapped hostages lie face-first on the stone.

One video shared by journalist Ricardo Ospina appears to show him casually raising his gun and firing at one of the victims.

“I saw the guy that was shooting up on the pyramid and yes, there were a lot of people, he had people as hostages,” witness Laura Torres told media, including N+ Noticias.

“In the short time I saw him let someone go down, a girl, he let her go down. For a moment I thought he was going to shoot her in the back, but no, thank God, he let her go. Then a bit later he let a boy go, but the hostages stayed there,” Torres said.

The Pyramid of the Moon was built between 100 and 450 C.E. — centuries before the Aztec empire — when Teotihuacan was among the largest cities in the ancient world.

The structure lies on the north end of the Street of the Dead, opposite the larger Pyramid of the Sun, and was used for human and animal sacrifices, among other religious ceremonies.

Archaeological evidence suggests most of these sacrifices were people captured from other parts of Mesoamerica.

With Post wires