A girl who was in critical condition after a barge hit a sailboat off Miami Beach on Monday has died, making her the third fatality connected to the crash, the authorities said on Sunday.

The girl was one of six passengers, including a 19-year-old counselor, participating in a sailing camp run by the Miami Youth Sailing Foundation, according to the Miami Yacht Club.

“Our hearts continue to mourn with all those impacted by Monday’s tragic incident, especially with the passing of another one of Miami’s children today,” Capt. Frank Florio, commander of Coast Guard Sector Miami, said in a statement on Sunday.

The yacht club said on Sunday that “now, with the passing of a third sailor, the entire sailing community is shattered by grief.”

Gabriel Groisman, the former mayor of Bal Harbour, a coastal village just north of Miami Beach, confirmed on Sunday that his 10-year-old cousin Arielle Buchman had died.

She was one of four children who were taken to the Ryder Trauma Center at Jackson Memorial Hospital in Miami, where two of them died on Monday after the crash, according to the Coast Guard.

The Miami-Dade County Medical Examiner’s Office on Tuesday identified them as Mila Yankelevich, 7, and Erin Ko, 13.

Another girl who was transported in critical condition to the hospital on Monday has since been released, said Petty Officer Third Class Nicholas Strasburg of the Coast Guard.

A fifth child was evaluated at the scene but did not go to a hospital, Lt. Pete Sanchez, a spokesman for the Miami Department of Fire-Rescue, said on Monday. The Coast Guard later said that victim was a 12-year-old girl.

The counselor did not go to the hospital, officials said.

The Coast Guard said it received a report just before 11:30 a.m. on Monday of a collision involving a sailboat with six people on board and a tug and barge near Hibiscus and Monument Islands.

Divers and rescue boats from several agencies responded and pulled all six people from the water, the Florida Fish and Wildlife Conservation Commission said.

The authorities said they believed that all of the girls were wearing life jackets.

The sailboat operator, a person on the barge and the pilot of the tug were tested for drugs and alcohol and the results all came back negative, Petty Officer Strasburg said.

The sailboat has been salvaged and removed while the tug and barge remain on the scene, he said.

The yacht club said on Tuesday that it was closed until further notice.