The governments of the countries that lost citizens when Iran shot down a Ukrainian airliner demanded Thursday that Tehran accept “full responsibility” and pay compensation to the victims’ families, Canadian Foreign Minister Francois-Philippe Champagne said in London.

“Families want answers, the international community wants answers, the world is waiting for answers and we will not rest until we get them,” he said.

Francois-Philippe Champagne noted Iran had accepted responsibility, but only a full investigation would reveal the “exact cause” and who was responsible.

The foreign ministers of Canada, the UK, Afghanistan, Sweden and Ukraine issued the statement on after a meeting at the Canadian High Commission on Trafalgar Square.

All 176 people aboard the Ukraine International Airlines died when it was brought down by missiles shortly after taking off from Tehran’s Imam Khomeini International Airport on January 8.