NASHUA, N.H (WHDH) - Following a search across parts of southern New Hampshire, an arrest was made in the case of a man shot in Brookline, New Hampshire, while an investigation into a nearby fatal shooting in Lyndeborough continues.

Part of Auburn Street was sectioned off by police tape in Nashua on Wednesday, where police could be seen investigating after the arrest of Robert Gagnon, 45, of Manchester.

Gagnon was arrested and charged with one count of Attempted Murder, according to the office of Attorney General John Formella, following a shooting in Brookline earlier in the day that left a victim, Carlos Quintong, 44, suffering from multiple gunshot wounds. In a press release, the office said the shooting happened in the area of Route 13 and Townsend Hill Road around 6:30 a.m.

The arrest came after police spent the morning investigating both the Brookline shooting and then a “shooting death” in Lyndeborough, some 15 miles north of the scene.

That morning, the AG’s office said officials were investigating reports of “two suspicious deaths” in the area of Lyndeborough. In an update, the office found that only one person had died in a shooting, a man later identified as 83-year-old Robert Prest. Prest had been found dead inside a home at 774 Center Road, after authorities were called to the area around 9:21 a.m.

The AG’s office also said officials found reports of the other suspicious death stemmed from the shooting in Brookline, where the victim had, in fact, survived, later confirmed to be Quintong.

The same update said police believed the shootings were related, and that authorities had conducted searches in Lydeborough, Brookline, Greenfield, Milford, Wilton, and Nashua before the “person authorities were looking for” was found and arrested in Nashua without incident.

Authorities said the suspect was transported to police headquarters as officers sealed off the street to search for a possible murder weapon.

In another update late Wednesday night, the AG’s office said Robert Gagnon had been arrested and charged with the shooting in Brookline, and that the death in Lyndeborough remained under investigation.

The update did not attribute Prest’s death to a suspect, but did note that “all parties involved in these incidents appear to have been identified and there is no known threat to the public at this time.”

Speaking with 7NEWS, people in Nashua who lived and worked around the area at the time of the arrest said what they witnessed was like a scene out of a movies.

“We simply saw a bunch of vehicles pulling into the street,” Mark Pearlman, a concerned resident, said. “And some pretty heavy duty, I mean guns being pulled out of the trunks.”

“They were just walking down the street and, their rifles by their sides, pointed at the ground,” another concerned resident, John Koutsos, said. “And just walking in that direction toward where it’s taped off.”

This is a developing story; stay with 7NEWS on-air and online for the latest updates.

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