Coronavirus outbreaks at a number of platforms operated by Brazilian state-run oil firm Petrobras hit production in the second quarter, leading to a fall in output, the company said July 21.

In a securities filing, Petrobras said it produced 2.802 MMboe/d in the second quarter. That was up 6.4% from the same period last year but down 3.7% from the first quarter.

Petrobras said the reduction was due to the idling of shallow-water platforms, coronavirus outbreaks on offshore facilities and reduced demand. The company had previously announced the plans to hibernate 62 shallow-water platforms, whose lifting costs tend to be relatively high.

Among the larger platforms that saw production stoppages, Petrobras said, were the Capixaba, the Cidade de Santos, the Cidade de Angra dos Reis and the Cidade de Mangaritiba, all of which experienced significant coronavirus outbreaks among workers.

In July, Petrobras indicated that output has been strong in its massive Buzios oil field, the nation’s second most productive. Four platforms operating there hit a record in July of 844,000 boe/d, Petrobras said.