Three Navy sailors assigned to the USS George H.W. Bush aircraft carrier killed themselves last week in separate incidents, officials said Monday.

The commanding officer of the carrier, which is docked at the Norfolk Naval Shipyard in Virginia, announced the deaths in a post on the ship’s Facebook page Monday.

“It is with a heavy heart that I can confirm the loss of three Sailors last week in separate, unrelated incidents from apparent suicide. My heart is broken,” Capt. Sean Bailey wrote in the announcement.

None of the deaths occurred on the carrier, which is docked at the shipyard for repairs, Navy Times reported.

The crew members who killed themselves last week are the third, fourth and fifth sailors assigned to the ship to commit suicide in a two-year period, Bailey added in his statement.

Bailey urged sailors on the carrier to come forward with suggestions on how to put an end to the string of suicides.

“We need All Hands to engage by bringing forward your suggestions and ideas for how we can work together to prevent another suicide,” he wrote in the post, adding: “I want to reiterate that there is never any stigma or repercussion from seeking help.”