BARCELONA, Spain — African countries boycotted meetings at U.N. climate talks Tuesday, saying that industrial countries had set carbon-cutting targets too low for reducing global greenhouse gas emissions.

The action forced several technical meetings to be canceled at this week’s U.N. climate talks in Barcelona. Delegates warned that, unless the African protest was settled, it could set back the timetable for concluding a new climate change pact at a major U.N. conference next month in Copenhagen.

The 50 or so African countries said they would only discuss pledges submitted by wealthy countries, and that talks on other issues including carbon offsets and action by developing countries should not move forward until there is full commitment by industrial countries.