New York ( CNN ) -- Officials in New York said Tuesday they are looking into what happened to cleanup efforts during last week 's monster blizzard . The New York City Department of Sanitation has drawn sharp criticism since the storm that blanketed much of the Northeast . Workers there have been accused of deliberately slowing down the response in retaliation for the city 's belt-tightening measures . New York City Councilman Dan Halloran said three sanitation workers and two Department of Transportation supervisors came to his office saying their bosses ordered the slowdown , telling workers that `` the mayor will see how much he needs us '' and `` there will be plenty of overtime . '' `` This office is reviewing information provided to it by City Councilman Dan Halloran , among others , with respect to last week 's snowstorm and the City 's response thereto . In addition , we have been in contact with the City 's Department of Investigation , '' Queens District Attorney Richard Brown said in a statement . He added that his office has not yet reached a decision as to whether a formal investigation is warranted . Sanitation Commissioner John Doherty has said he had not seen evidence of a worker protest . Similarly , the head of New York 's sanitation workers union , Harry Nespoli , has said he was not aware of any slowdown and doubted there was a protest by workers . Department of Investigation Commissioner Rose Gill Hearn said her office was looking into reports of wrongdoing and asked anyone with information to step forward . `` DOI is continuing its multi-borough investigation into whether there is any evidence of intentional acts of commission or omission related to the snow clean up and has been conducting its investigation since last week , '' the department said in a statement Tuesday . `` As we always do , we will provide our factual findings when we have concluded . In addition , we have heard from various prosecutors ' offices and if we find a violation of state or federal law will work closely with the appropriate agency , '' it continued . Authorities in Brooklyn also said they would review what happened with respect to snow removal last week . Robert Nardoza , spokesman for the U.S. Attorney 's Office Eastern District of New York , declined to say if officials there would pursue a criminal investigation related to the response . CNN 's Jordana Ossad contributed to this report .
Authorities in Queens and Brooklyn are reviewing snow removal after blizzard . District attorney in Queens stops short of saying a formal investigation is warranted . Department of Investigation commissioner urges anyone with information to step forward . Sanitation workers are accused of having deliberately slowed down cleanup efforts .