"It is extremely important that if a nation uses violence – there can be a need to use violence – the country should investigate thoroughly and publish the findings openly," he told reporters.
"If any faults have been made, the country should make them known and punish those responsible," he added. "I'm waiting for a thorough investigation by the Israeli government."
Blok is the latest senior Western politician to urge an investigation into Israel's use of lethal violence against Palestinians participating in the Great Return March protests in the Gaza Strip.
The United Nations Human Rights Council is today discussing a call for the establishment of an independent investigation in to this week's events.