PICTURED: Arthur Martinovich, 34, the hammer-wielding madman suspected of killing two workers and critically injuring a third at a Brooklyn restaurant on Tuesday

A second man has died as a result of a hammer attack at a Brooklyn restaurant.

Witnesses say Arthur Martinovich, 34, walked into Seaport Buffet in Sheepshead Bay just before 5.15pm on Tuesday and began bludgeoning the restaurant's 60-year-old owner Kheong Ng-Thang, who was at the front of the buffet.

He went to the back of the restaurant, where he struck 34-year-old chef Fufai Pun and 50-year-old manager Tsz Mat Pung before fleeing the scene.

Cops captured Martinovich about two blocks away from the bloody scene. He reportedly became combative minutes before his perp walk and assaulted an officer.

Martinovich was subsequently secured on a stretcher with restraints on his arms and legs. An ambulance transported him to the psychiatric unit at Kings County Hospital, where he is under evaluation.

All three victims were taken to another hospital, where Pun was pronounced brain dead.

A second victim, whose name has not been released, was confirmed dead on Friday.

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Martinovich is seen secured to a stretcher with restraints after police apprehended him near the scene of the vicious attack on Tuesday

Witnesses say Martinovich walked into Seaport Buffet in Sheepshead Bay just before 5.15pm began bludgeoning the restaurant's 60-year-old owner at the front of the buffet before heading to the back, where he fatally struck 34-year-old chef Fufai Pun and another 50-year-old employee before fleeing the scene

Cops captured Martinovich about two blocks away from the bloody scene. He reportedly became combative in custody, forcing authorities to place him on a stretcher in restraints

Several employees who witnessed the attack have said the perpetrator, believed to be an immigrant from Estonia, appeared to be specifically targeting Chinese victims.

A dishwasher at the restaurant, 41-year-old Francisco Sales, told the New York Daily News that the attacker told him: 'I don’t have a problem with the Hispanics, but with the Chinese.'

Despite the attempt at reassurance, Sales sprinted out of the eatery clutching a stick to defend himself if necessary.

Though Sales and others told police Martinovich's actions appeared racially motivated, authorities have no plans to charge him with a hate crime.

He is, however, facing charges for murder, attempted murder and weapons possession.

A police source said of the attack: 'It was unprovoked. It appears random. [Martinovich] is an emotionally disturbed person.'

Law enforcement sources also said he told cops he was inspired by a movie about Chinese mistreatment of women.

'He had problems with Asian men,' one source said. 'He talked about how Asian women are being treated by their men.'

Witnesses said the suspect was also rambling about aliens, and claimed 'voices' told him to hurt the victims.

'He was saying psycho stuff about space aliens,' another police source added.

Several employees who witnessed the attack at Seaport Buffet (above) have said the perpetrator appeared to be specifically targeting Chinese victims

Havoc erupted when Martinovich approached restaurant owner Kheong Ng-Thang and struck him on the head with the curved side of the hammer, causing terrified customers to flee

Ng-Thang and restaurant manager Tsz Mat Pung, 50, were hospitalized with massive head injuries, according to authorities. The chef, Fufai Pun, was taken to the hospital and pronounced brain dead from a blow to the head. A second victim died Friday

Martinovich was transported to Kings County Hospital for psychiatric evaluation. He is facing charges for murder, attempted murder and weapons possession

Sales said Martinovich appeared calm when he first entered the restaurant, wearing construction gloves.

Havoc ensued when he approached the owner and struck him on the head with the curved side of the hammer.

Terrified customers at the buffet ran out of the restaurant and went to Randazzo's Clam Bar next door for cover.

'A guy who worked there ran in. He said: "The guy hammered the manager in the head and there's blood everywhere,"' waitress Kimberly Bisono recalled.

'People were rushing out. One of the customers ran in and said: "Lock your doors. He's attacked people with a hammer and he's on the loose.'"

Samantha Randazzo, who owns the Clam Bar, said she let Seaport Buffet customers take cover in her restaurant.

'We tried helping people who were trying to come in, customers, but we were scared to even walk out,' she told NBC New York. 'We didn't know where he was.'

'They said a guy came in crazy with a hammer and started hammering certain people, random people, said he was just screaming crazy words like "I'm killing everybody, world is hell."'

A police source said of the attack: 'It was unprovoked. It appears random. [Martinovich] is an emotionally disturbed person'