A carload of illegal immigrants from Honduras (search) plunged into an irrigation canal and overturned just miles from the Mexican border, killing all nine passengers, state troopers said early Tuesday.

The victims of the one-car wreck were pulled late Monday night from about six feet of water in the canal where their sedan came to rest upside-down, the Texas Department of Public Safety said.

"The Hidalgo police arrived and jumped into the water and started pulling people out of the vehicle and putting them onto the canal banks," said trooper Johnny Hernandez.

He said it was not believed that the victims' Ford LTD was speeding or being pursued before it left the road. "It looked like it was a low-speed accident where the car flipped over into the water."

The crash occurred at 10:15 p.m. on a small bridge across the canal, about two miles from the Texas-Mexico border.

Hernandez said the U.S. Border Patrol (search) has detained a woman believed to have been with the group earlier and authorities planned to interview her.

The victims were pronounced dead and identified from passports and other identification as illegal immigrants from Honduras, Hernandez said.