A professor of international law says Labour Leader Chris Hipkins has missed the boat in calling for an immediate ceasefire in the Israeli-Gaza conflict. Mr Hipkins made the call yesterday saying "the violence and the killing has to stop". He stressed he'd spoken as leader of the Labour Party, not as caretaker Prime Minister, but questions are being raised about the appropriateness of his comments. The University of Waikato's International Law Professor Dr Al Gillespie spoke to Charlotte Cook.