Facebook's Mark Zuckerberg and Sheryl Sandberg will not attend a hearing in Ottawa later this week, despite receiving summonses from the Canadian Parliament, their company has confirmed. The decision could result in the executives being held in contempt of Parliament. CNN reports that both executives received formal requests earlier this month tied to a gathering of an international committee examining Silicon Valley's impact on privacy and democracy. Zuckerberg and Sandberg have testified before the US Congress on the subject. Facebook said it was sending Kevin Chan, its head of public policy for Facebook Canada, and Neil Potts, its director of public policy, to the meeting instead. Lawmakers from at least 10 countries, including the UK and Australia, are expected to attend the meeting, which is the second of its kind.