Workers from the utility company found dangerous connections in August . The crew went to the building after someone smelled gas in the basement . Company shut off the building 's gas for about ten days until it was 'safe ' Blast occurred Thursday at Second Avenue restaurant at 121 Sushi Park . Workers with Con-Ed visited site hour before explosion to inspect gas work . Three buildings on block caught alight and collapsed in seven-alarm blaze . Nicholas Figueroa , 23 , and Moises Lucon , 26 , still missing after explosion . Contractor who investigated on Thursday was one of 50 people arrested in February sweep of the city by building and housing inspectors . The contractor , Dilber Kukic , was accused of bribing an undercover investigator to dismiss violations at two properties .
Workers from the utility company found dangerous connections in August . The crew went to the building after someone smelled gas in the basement . Company shut off the building 's gas for about ten days until it was 'safe ' Blast occurred Thursday at Sushi Park restaurant at 121 Second Avenue . Workers with Con-Ed visited site hour before explosion to inspect gas work . Three buildings on block caught alight and collapsed in seven-alarm blaze . Nicholas Figueroa , 23 , and Moises Lucon , 26 , still missing after explosion . Contractor who investigated on Thursday was one of 50 people arrested in February sweep of the city by building and housing inspectors . The contractor , Dilber Kukic , was accused of bribing an undercover investigator to dismiss violations at two properties .