New York ( CNN ) Crews searching at the site where a building exploded in New York 's East Village found two bodies in the rubble Sunday . The victims ' remains have not yet been officially identified , but authorities believe they are the two people who were reported missing after Thursday 's blast , New York Fire Commissioner Daniel Nigro told reporters . The men reported missing last week , Nicholas Figueroa and Moises Locon , were thought to have been at a sushi restaurant at the time of the explosion . Crews are still searching the scene , Nigro said , even though it 's unlikely there are other victims . Three buildings collapsed and four others were damaged Thursday by the explosion and raging gas-fueled fire that followed . Nigro declined to discuss details about what caused the blast , saying an investigation is ongoing . Investigators are looking into whether a gas line was `` inappropriately accessed '' at the building where the explosion occurred , New York Mayor Bill de Blasio told reporters Friday . Gas utility inspectors checking on work in the building 's basement left the premises about 30 minutes before the explosion . In August , Con Edison shut off gas lines at the building for 10 days after discovering they 'd been tampered with , according to Alfonso Quiroz , a spokesman for the utility . Images from the scene . Before last week 's blast , the restaurant 's owner had smelled gas and contacted the building 's owner , but did n't contact authorities . That was a `` major mistake , '' New York Emergency Management Commissioner Joe Esposito said Sunday . `` They should have called 911 , '' he said . `` We do n't know what the outcome would have been . But that 's what they should have done . '' Nicholas Figueroa 's body was one of those recovered from the rubble Sunday , family spokeswoman Awilda Cordero told CNN affiliates NY1 and WABC . `` Thank you to everybody for all the effort they did , '' she said . `` Yes , it is Nicholas . They found him . '' Figueroa , who had recently graduated from college , was on a date at the sushi restaurant and went to the back to pay when the explosion occurred . The family is devastated , she said , but relieved to learn that his body was found . `` They 've been waiting and waiting . ... This is just the beginning of doing something that they needed to do , '' she said . Locon , an employee at the restaurant , was reported missing by his brother , police sources said last week . `` I saw that young man every day , every single day we had a chat to say 'hello how 's business , ' '' Michael Schumacher , who owns a grocery store near where the explosion occurred , told WABC . `` Kid worked hard for his family '' Schumacher said . CNN 's Julia Talanova reported from New York . CNN 's Catherine E. Shoichet reported from Atlanta . CNN 's Ray Sanchez , David Shortell and Jamie Wiener contributed to this report .
Nicholas Figueroa 's body was found in the rubble , a family spokeswoman says . Emergency commissioner : " The building is not safe to enter and we are asking people who live there to leave immediately. Blast ripped through the East Village ; three buildings collapsed , four others were damaged .