Investigators were probing Friday whether a contractor improperly accessed a gas line in a basement below a sushi restaurant, setting off a fiery explosion that leveled three buildings, injured about two dozen people and left at least two missing in the East Village, authorities said Friday.
"There is a possibility here that the gas line was inappropriately accessed internally by people in the building," but officials need to get access to the wreckage to explore it further, Mayor de Blasio said during a press conference Friday. He wouldn't say more about why officials believe that's a possibility.
The contractors working on the Sushi Park restaurant did not have permits for gas work, the mayor said Friday.
Investigators are also checking whether the gas line was re-routed so it would not go through the gas meter, sources told NBC 4 New York. The sources said last August Con Ed that discovered what appeared to be an improper piping scheme in the basement and told the building to stop it.
The investigators are checking whether workers may have turned off the gas prior to a Con Edison inspection Friday and turned it back on after the inspectors left, sources told NBC 4 New York.
The Manhattan District Attorney's office has joined the probe into the blast Thursday that shook the lower Manhattan neighborhood, sparked a fire that officials say could smolder for days and leveled three buildings on Second Avenue and E. 7th Street.
Firefighters were still working to put out hot spots Friday, Chopper 4 video over the scene shows, and rescue workers with K9 units were on the scene searching for the two missing people.
Inspectors with Con Ed had been to the East Village building to check on ongoing work to upgrade gas service. The utility said the work didn't pass inspection, so gas wasn't introduced to the line, and inspectors gave instructions and left at around 2:45 p.m. Con Ed said inspectors didn't smell any gas.
But at around 3 p.m., the sushi restaurant owner smelled gas and called the landlord, who then called a general contractor, Boyce said. No one called 911 or Con Ed, however, de Blasio said.
The contractor, Dilber Kukic, and the owner's son went into the basement and opened a door, and then the explosion happened, burning their faces, NYPD Chief of Detectives Robert Boyce said.
"The whole area was shaking," said Moishe Perl, who works next door. "We couldn't imagine what was going on."
The building had an existing gas line intended to serve the sushi restaurant; the work underway was to put in a bigger line to serve the entire building, Con Ed President Craig Ivey said. As for whether the apartments were getting gas from the existing line, "That's a great question," he said.
"We'll have to find out, through the investigation, what's going on there," he said.
City records show the contractor, Dilber Kukic, got a permit last June for plumbing, flooring, removing partition walls and other work at the building.
Kukic had tried to help people escape the explosion and had been helpful to authorities, Boyce said.
The contractor -- who's facing unrelated charges of bribing an undercover investigator posing as a housing inspector -- was injured in the blast declined through his lawyer to comment on the circumstances surrounding the explosion.
Kukic is a relatively minor player in a 50-person bribery case that Manhattan District Attorney Cyrus R. Vance Jr. and other authorities unveiled last month. They said city inspectors, landlords and contractors formed a network of graft that exchanged $450,000 in payoffs to get safety violations dismissed, procure phony eviction orders and get fast, favorable and sometimes nonexistent inspections.
Kukic is accused of paying $600 in cash to try to get housing violations dismissed at two upper Manhattan properties he owned. He has pleaded not guilty.
Meanwhile, businesses and residents who occupied the three buildings that were destroyed are trying to pick up the pieces. Dozens of people and businesses were displaced at least temporarily by the blast. Eleven buildings were evacuated following the explosion, though NYPD officers allowed some residents to return briefly to their apartments Friday to grab a few items.
Chelsea Blampied, who lived in one of the leveled buildings, said she'd stopped home to get a work file from her third-floor apartment when she heard and felt the blast.
"I thought a plane crashed into my building. Glass was blown everywhere, and it was just so surreal," she said.
"I just heard a really loud boom," recounted neighbor Justine Miller. "I could feel it in my chest."
Blampied left behind all her belongings and ran through smoke and debris down the stairs to safety as her building began to crumble. She's now staying with friends and is grateful she made it out alive.
"It's so overwhelming. Everyone lost everything," she said.
Gregory Dohdanowycz was in his top-floor apartment in the building next to where the blast happened.
"I look out the window, and I see two buildings south of me, there's smoke rising from the windows and their roof windows," he said.
He only had time to grab his dog before running outside, and was overwhelmed by the horrific sights and sounds when he got outside.
Neighbor Miller said: "There was blood on the ground. There were people laying up against buildings and other people trying to help them."
Naya Jones, who spent the night at the YMCA after being told to leave her building near the blast site, went to the Tompkins Square Library Friday, where the Red Cross and other relief groups were offering financial assistance, food, vouchers and advocacy help.
The Red Cross said it has helped more than 80 people since the blast and gave housing assistance to 30. The Standard Hotel is giving anyone displaced by the blaze three free nights of lodging. Sprint has also donated 25 cellphones.
The ASPCA is also providing pet supplies for owners in the affected area.
"It's a small community," said Bohdanowycz. "I think everyone is trying to help out when something bad happens."
Several long-standing businesses were also affected by the destruction. Pommes Frites, a favorite spot for fries, was destroyed by the blast, and the nearby Orpheum Theater had to cancel performances of the off-Broadway production of "Stomp."
Robert Seniuk, the chef at Stage restaurant across the street, is determined to get back to work.
"We open, we don't give up. This city is 24 hours," he said.
Nevertheless, the frightening explosion has taken a toll on the psyche of New Yorkers everywhere.
"Yesterday was a very scary day. Now all I can do is think about the people who lost their homes and people who've been living here for decades," said neighbor Adam Mashaal.
The explosion comes a week after the one-year anniversary of the East Harlem explosion that leveled two buildings and killed eight people. The blast also injured dozens of people and left many homeless for months.
Since the 2014 explosion, the FDNY has been given a much greater role in responding to reports of possible gas leaks and New Yorkers are now encouraged to call 911 about gas leaks and odors rather than 311.