One of Warren Buffett's newest acquisitions is putting the squeeze on its workforce.

H.J. Heinz Co. is eliminating 600 jobs across the U.S. and in Canada, including 350 in Pittsburgh, nearly a third of the operation in its hometown, it said Tuesday.

The ketchup maker was sold in June to Buffett's Berkshire Hathaway and the Brazilian investment firm 3G Capital for $23.3 billion. The deal was announced in February.

The layoffs were the result of a review of operations, spokesman Michael Mullen said. They're intended to enable faster decision-making, increased accountability and accelerated growth, he said.

