According to a statement from the 7th fleet of the U.S. Navy, a number of the sailors who were missing after the USS Fitzgerald collided with a container ship last week off the coast of Japan were found dead in the berthing compartments of the Fitzgerald.

A Navy spokeswoman wouldn’t confirm if all of the sailors were found, or just some of them. The statement said that the remains would be formally identified, and the families would be notified before they are identified publically.

The incident happened late last week when the Fitzgerald collided with a container ship, severely damaging the Aegis-class destroyer. It was towed into port on Saturday, where rescue crews were able to access the ship, where the sailors were found.

Civilian and military investigators are investigating the cause of the accident, which occurred between two ships that both have advanced navigation systems.

Three of the crew were taken to the U.S. Naval Hospital at Yokosuka, where they are awake and being kept under observation, according to the 7th fleet.

In a tweet Saturday, U.S. President Trump said “Thoughts and prayers with the sailors of USS Fitzgerald and their families. Thank you to our Japanese allies for their assistance.”

The search for the missing crew was conducted by American forces, with assistance from Japanese forces.