The Navy has suspended another contractor that services and supplies Navy ships and submarines, this time for what the Navy called "questionable business integrity."

The Navy announcement Wednesday evening provided no details on allegations against the company, Inchcape Shipping Services Holding Ltd., whose website describes it as one of the world's leading maritime services providers, doing business in 66 countries.

The suspension prevents the Department of the Navy and all other federal agencies from entering into any new contracts with Inchcape.

The Navy already is investigating a number of senior Navy officers in connection with an alleged overbilling scheme by another maritime services contractor, Glenn Defense Marine Asia, whose chief executive was arrested in September on charges that he bribed Navy officers.