Petroleo Brasileiro SA (PETR4.SA) will cut its 2016-2020 investment plan by 5 percent to $93 billion as the state-run oil company contends with dwindling oil prices and a massive corruption investigation, the O Globo newspaper reported on Sunday. The embattled Brazilian company, known as Petrobras, could reduce its investments even further if a series of planned debt-reducing asset sales are completed, the paper reported without citing sources. The press office of Petrobras did not respond immediately to an emailed request for comment.