Gov. Phil Murphy's surgery to remove what was likely a cancerous tumor on his kidney was successful.

Acting Gov. Sheila Oliver said in a tweet Wednesday that Murphy is resting at a New York hospital. She gave no other details about the surgery.

Murphy’s office has said that 90% of such tumors are cancerous, but doctors weren't able to tell for sure until the surgery.

Oliver's tweet didn't address whether the tumor was cancerous.

Murphy revealed that he had a tumor last month. He has told the media that doctors were confident of being able to eradicate it.