Two women died and 48 people were injured after a tour bus overturned on a highway in Delaware Sunday afternoon.

Passengers on the bus, which is owned by a company in New York City's Chinatown named Am USA Express Inc., were on a three-day sightseeing tour, which began Friday as they traveled from New York to Washington, DC. The group had left DC and was heading back to New York at the time of the crash.

The accident occurred around 4:20 p.m. in New Castle when the bus came to a curve on an exit ramp and overturned, according to a Delaware State Police news release, reports the Associated Press. The bus then slid on its roof off the road down a grassy embankment before landing on its left side, said spokesman Sgt. Paul Shavack in the release.

Hua'y Chen, a 54-year-old woman from New York City, was found pinnded underneathe the bus and was pronounced dead at the scene. Idil Bahsi, a 30-year-old woman from Istanbul, Turkey, died Sunday night after being transported to a hospital.

Elvis D'cruz, a 19-year-old college student from New Castle, said he was driving home when he and his friend spotted the overturned bus and stopped to help the victims.

"It must've been within five minutes of the crash," D'cruz told NBC10. "There were about two to three other civilians there helping out. The bus had flipped over onto its side and some people were still underneath it. The bus was completely in a ditch. We tried to help them get out, as much as we could. We went to the car, got first aid equipment and passed out gauze and bandages, whatever we could to comfort people."

He went on to describe the scene, saying "It was hard seeing that little boy in the middle of the crash scene. What I really can't forget is all of the screaming and the smell of blood in the air. People didn't know what to do. There was no one else at the scene. Within 15 minutes, State Police arrived."

The driver and the 48 passengers, including two children, were all injured in the crash and transported by helicopter to several local hospitals. At least three people were critically injured.

"The injuries vary widely," said Dr. Rob Rosenbaum, an Emergency Room physician at Christiana Care. "Some patients have head injuries. Some have injuries to their torso, ribs, abdomen and fractures."