UPDATE: Tracy Morgan Undergoes Leg Surgery; Amputation Rumors are 'False'

Former 30 Rock star Tracy Morgan, who was was involved in a car crash on Saturday that included two tractor-trailers and an SUV, remains in critical condition but stable condition at Robert Wood Johnson University Hospital in in New Brunswick, New Jersey, according to the actor's publicist.

The rep also denied rumors that the comic's leg would be amputated. "Tracy remains in critical but stable condition. His fianceé Megan is by his side," he said in a statement to PEOPLE. "As we shared yesterday, Tracy had surgery on his broken leg. This recovery will be arduous and we hope that you can be patient during this difficult time." The 45-year-old is expected to remain in the hospital for several weeks.

Morgan's injuries included broken ribs, a broken nose, a broken leg and a broken femur. Comedian James "Jimmy Mack" McNair was killed while four were hospitalized as a result of the accident which occurred on the New Jersey Turnpike early Saturday morning, June 7th. Comedians Ardie Fuqua and Harris Stanton a man named Jeffrey Millea were the others injured.

Walmart Truck driver Kevin Roper, 35, was charged with one count of death by auto and four counts of assault by auto. "This is a tragedy, and we are profoundly sorry that one of our trucks was involved," Bill Simon, president and CEO of Walmart U.S., said in a statement. "The facts are continuing to unfold. If it's determined that our truck caused the accident, Walmart will take full responsibility."

Christopher Thompson, the co-owner of Atlantic Transportation Services, which was operating the limo bus, said he believed the bus was heading to drop Morgan off in New Jersey.

About Tracy Morgan:

From 2006 to 2013, Morgan starred on NBC's Emmy and Golden Globe Award-winning "30 Rock," opposite Tina Fey and Alec Baldwin as Tracy Jordan, the unpredictable star of the fictional hit variety show "TGS with Tracy Jordan." In 2009, he received an Emmy nomination for "Best Supporting Actor" for his work on "30 Rock."

One the big screen, he has starred in numerous films including "The Son of No One," "Why Stop Now," "Half Baked," "Deal at a Funeral" and "The Longest Yard." He has provided his voice to numerous animated characters over the years including Luiz in "Rio" and the upcoming "Rio 2," and Blaster in "G-Force."

In 2009 he released his first book, "I Am The New Black," a compilation of studied anecdotes and some of the more serious moments that shaped him and his career.

Source: PEOPLE