The United Nations says peace talks between warring sides in Yemen have ended amid severe new fighting in the country.

The U.N. office in Geneva says the special envoy for Yemen, Ismail Ould Cheikh Ahmed, will hold a press conference Sunday on the topic. The peace talks between pro-government fighters and Shiite rebels began Tuesday in the Swiss village of Macolin.

Fierce fighting and airstrikes by a Saudi-led coalition pounded northern Yemen on Saturday, as the two main parties in the country's conflict continued to violate a cease-fire.

The clashes in Hajjah Province near the Saudi border between rebel-allied units and pro-government Yemeni forces have killed more than 75 people over the past three days, according to Yemeni security officials and witnesses said.