The gunman who opened fire outside the Empire State Building, killing one person and injuring several others, was a disgruntled former worker at a nearby company owned by a Syrian Jew, sources told the Forward.

Owner Ralph Hazan was upstairs in the offices of Hazan Imports on W. 33rd St. when the suspected shooter, identified as Jeffrey Johnson, 53, opened fire near the landmark on Fifth Ave. in Manhattan, police and sources said.

Hazan, an observant Orthodox Jew in his 60s, sat in the office for hours, stunned by the senseless tragedy, until relatives came to pick him up, a longtime family friend told the Forward.

“He was in shock,” the friend said. “He sat there for a good part of the day.”

The friend described Hazan, who lives in West Long Branch, N.J., as a gentle man, with many friends.

“He is the nicest guy,” he said. “He would never hurt a fly.”

A source in the community said Hazan Imports, which makes women’s clothing and accessories, was once run by Hazan and his brother Isaac. Isaac Hazan had a stroke about three years ago and later passed away, leaving Ralph Hazan in charge of the company, the source said.

Johnson, a 53-year-old fashion accessories designer who was laid off from the company about a year ago, shot and killed a 41-year-old former co-worker three times with a .45 caliber handgun on a sidewalk near the landmark building, officials told news agencies.

Police returned fire, killing the shooter and wounding nine people.

The Wall Street Journal, quoting relatives, identified the victim of the shooting as Steve Ercolino, 41, a manager at Hazan Imports.

Johnson, who designed accessories for the company, walked up to Ercolino and shot him in the head just after 9 A.M.

Ralph Hazan’s friend stressed that the owner had no quarrel with Johnson and did not know why the gunman targeted Ercolino.

Johnson, who had no criminal record, tried to hide the .45-caliber gun in a bag and walk away, but witnesses chased after him and notified police, who confronted him on the street.

It was unclear if he was able to get off a shot before he was hit by police fire. Police bullets apparently also hit bystanders, officials said.

“Some of the victims may have been shot accidentally by police officers,” Mayor Michael Bloomberg said. Six people were rushed to Bellevue Hospital and another three to New York Hospital. Their injuries were not considered life-threatening.

Hazan Imports mostly made and distributed women’s handbags, according to another clothing manufacturer.

“Take the best of the past and infuse it with the best of today,” Ralph Hazan told the site. “We hope to enjoy a glorious ‘revival’ with both old and new audiences.”

The gunplay was not related at all to the Empire State Building itself, which sits in a busy commercial and tourist neighborhood. In 1997, a Palestinian gunman with a string of grievances opened fire on the 86th floor observation deck, killing one tourist and wounding six others.

Read more at the Forward.