MONTGOMERY COUNTY (AP) — Investigators say a man suspected of killing four people at his neighbor's home in Kansas is now suspected of killing a man near New Florence after fleeing the state.

The Missouri State Highway Patrol says two helicopters and dozens of officers are searching for 36-year-old Pablo Serrano. The patrol says Serrano should be considered dangerous and may be armed with an AK-47.

Authorities say four men were shot Monday night at the house in Kansas City, Kan. Serrano's truck was found Tuesday morning on the shoulder of Interstate 70 near New Florence.

The patrol says a 49-year-old man was found fatally shot in a rural home about five miles away near New Florence, and a witness reported seeing a man running from the property. Several schools were put on lockdown.

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Police are searching for a man in Montgomery County believed to be connected to a quadruple homicide in Kansas.

A pickup truck linked to the fatal shooting was found abandoned on Interstate 70 in Montgomery County. The suspect, identified as Pablo Antonio Serrano-Vitorino, was last seen Tuesday morning, police say.

He is considered to be armed and dangerous.

The Missouri State Highway Patrol is searching the area for the suspect. Police said the suspect was thought to be driving the truck after the Monday night shootings at a neighbor's home in Kansas City, Kan.

Three men were found dead at the home, and the fourth victim died at a hospital. Their names weren't immediately released.

Police officer Thomas Tomasic says one of the men managed to call police before he died. Tomasic said he didn't know how the men know one another or what prompted the shooting.

The Associated Press contributed to this story.