(Reuters) - At least two winning tickets in Tuesday night's Mega Millions drawing with a jackpot of about $400 million, the third-largest in its history, were sold in Florida and Maryland, state lottery officials said.

The winning numbers are 11, 19, 24, 33, 51, and 7, according to the Mega Millions website.

The jackpot swelled after no one matched all six numbers in Friday night's drawing.

There was no immediate word on the location where the tickets were sold or the identity of the ticket holders.

The record U.S. jackpot of $656 million was in a March 2012 Mega Millions drawing. In December 2013, lucky ticket holders struck the second-largest Mega Millions jackpot of $648 million.

Tuesday night's jackpot of an estimated $400 million carries a cash option of $224 million, the Mega Millions website said.

Mega Millions is played in 43 states plus the District of Columbia and the U.S. Virgin Islands. Jackpots start at $15 million, according to the website.

(Reporting by Barbara Goldberg and Eric M. Johnson; Editing by Grant McCool and Eric Walsh)