Sen. Charles Schumer (D-N.Y.) defended Rep. Anthony Weiner (D-N.Y.) Monday, saying he's sure the congressman had nothing to do with a controversial tweet that appeared on Weiner's Twitter account.

"I don't know the details. But I know him to be a person of integrity and I am virtually certain he had nothing to do with this," Schumer said, according to the New York Daily News.

Schumer was referring to a tweet that was sent from Weiner's account Friday and featured a lewd photo of a man from the waist down, wearing nothing but underwear.

It was quickly deleted, and Weiner said the tweet was the result of someone hacking his account.

"This was a prank, and a silly one. I am focused on my work," he said in a statement to the Daily News.

The scandal was deemed "Weinergate" by the New York tabloids.

The seven-term lawmaker has retained counsel and plans to take legal action against the hacker, who so far has not been revealed to the public.

"We are loath to treat it as more, but we are relying on professional advice," Weiner's spokesman Dave Arnold told the paper.

(hat tip: Azi Paybarah