OTTAWA -- The Canadian Press has learned that Canada plans to kick-start a long-stalled international effort aimed at ridding the world of the key ingredients needed for nuclear weapons.

Canada's United Nations ambassador to Geneva is to spearhead the start of negotiations this week towards a Fissile Material Cut-off Treaty.

The treaty would aim to control access to enriched uranium and plutonium, but the UN process towards it has been deadlocked.

Meanwhile, Prime Minister Justin Trudeau is expected to attend U.S. President Barack Obama's Nuclear Security Summit in the spring.

Plans for Trudeau's attendance at the summit, which would come just weeks after the president is to welcome him to the White House, are referred to in the prime minister's briefing book.

Canada's renewed focus on nuclear non-proliferation efforts has been in the works for months, but the effort has urgency because of North Korea's recent claim to have conducted a test of a hydrogen bomb.