Authorities said that a shooting in the Four Corners region of New Mexico on Monday left four people dead, including an 18-year-old suspect who had multiple weapons and was shot by police. Two police officers were among the nine people who were injured, in addition to the three “civilian victims” who died. Police said that they arrived at 10:57 a.m. Monday after receiving 911 calls and found a “chaotic scene” with the shooter still firing at people.

Police did not release the name of the suspect. They said that they did not believe there was another person involved or any ongoing danger to the community. They asked anyone with information to contact them.

The governor of New Mexico, Michelle Lujan Grisham, expressed her sadness and prayers for the victims, their families, and the community of Farmington. She also praised the police for their quick response. She said that her administration would continue to fight against gun violence from every possible angle.

“Police had Farmington Municipal Schools lock down at 11:15 a.m., officials said. The order was lifted by 1:05 p.m. Agents of the Bureau of Alcohol, Tobacco, Firearms and Explosives and San Juan County sheriff’s deputies also responded.

Judith McIntosh, 77, said Monday afternoon she was driving home from the grocery store with a friend when she saw a woman lying on the street. She thought it was odd but continued driving. Moments later, as she was by a church near her home, three to five gunshots rang out.

McIntosh said she then saw at least one person lying on the grass on the church’s property. “We saw the first older lady in the street and thought she had been hit by a car,” McIntosh said. “And then we went a little bit further, by the church, and heard the gunshots. … And then we saw other people that were on the ground and thought: ‘Oh, my God. What’s going on? What’s happening?’ People are getting killed.” She added, “I’m still very upset.” McIntosh said that there was then a flurry of police activity in the area and that she was not able to get into her home for hours.

When she did, she discovered that a gunshot had pierced her bedroom window. “There was a bullet hole in my bedroom window, through the curtains, through the living room and over the top of my recliner.” McIntosh said the bullet struck her living room wall. “If I happened to be home, I could have been shot,” she said. Investigators were concentrating on Dustin Avenue between Ute and Apache streets in Farmington, officials said.

The city, with a population of a little over 46,000, is about 200 miles northwest of Santa Fe, the state capital. The community — near the famed Four Corners, where the borders of New Mexico, Utah, Colorado and Arizona meet — is also close to three major Native American reservations: those of the Navajo, the Ute Mountain Indians and the Southern Utes.”

The five members of Congress from New Mexico — Senators Martin Heinrich and Ben Ray Luján and Representatives Teresa Leger Fernández, Melanie Stansbury and Gabe Vasquez — expressed their gratitude to the first responders and their sympathy to the families of the victims in a joint statement. They also pledged to work on federal legislation to combat gun violence.

They said: “We are heartbroken by the mass shooting that happened today in Farmington, New Mexico. We are waiting for more information, but we are thankful to our local and state law enforcement officers who were at the scene, and to our health care workers who are treating those who were wounded. Our thoughts are with the loved ones of those who died and those who were injured.”

This was the third mass shooting in less than two weeks. On Saturday night, a shooting in Yuma, Arizona, left two people dead and five others wounded, police said.

The seven victims were all male and had been shot. Two of them, aged 19 and 20, died at the hospital. No one had been arrested.

A week earlier, a shooter with an AR-15-style weapon and neo-Nazi views killed eight people at a mall near Dallas.

The shooter, 33, was shot dead by an officer who was at the shopping center in Allen, authorities said.

The victims included a boy and his parents, two sisters in elementary school, a security guard with dreams and an engineer with a new master’s degree.