New York State Senate leader Dean G. Skelos and his son could be charged as soon as Monday in connection with a federal corruption investigation, sources familiar with the case tell NBC 4 New York.
Last month, federal prosecutors started presenting evidence to a grand jury in an investigation of the Long Island Republican, an investigation first reported in January by NBC 4 New York.
Subpoenas have already been served to a number of people close to Skelos -- among them, several state senators on Long Island, according to sources familiar with the investigation.
Federal investigators have been looking into Skelos' sources of income. Skelos denies any wrongdoing and has called reports that he is under federal investigation "irresponsible."
A spokesman for Skelos has not returned requests for comment.
The senator's 32-year-old son, Adam Skelos, is also a focus of the investigation, sources familiar with the probe said. He was hired by an Arizona-based stormwater treatment company, AbTech, which was awarded a contract in his father's district despite the fact it wasn't the low bidder, the New York Times first reported.
U.S. Attorney Preet Bharara is also looking at Skelos' ties to the real estate industry, among other areas of inquiry, sources said. A spokesman for Bharara and an FBI spokesman declined comment.
Skelos, the highest ranking Republican in state government, has not been charged with any wrongdoing.
Skelos said in a second statement last month, "I have and will continue to cooperate with any inquiry."
The revelation that Skelos is under investigation comes less than three months after Democratic Assembly Speaker Sheldon Silver was arrested and charged for allegedly taking $4 million in bribes.
Silver denies the charges.