UPDATE: Most, not all, Washington-based Everest teams accounted for

SEATTLE (AP) — Several Washington state-based mountain-guiding companies are reporting their teams are OK after a massive earthquake in Nepal sent an avalanche sweeping into a mountaineering base camp on Mount Everest, but at least one said it does not have all staff accounted for.

About a half-dozen Washington outfits — including Alpine Ascents, International Mountain Guides and Rainier Mountaineering Inc. — had expeditions on or near Mount Everest when the earthquake struck Saturday, killing more than 1,100 people. The avalanche claimed at least 10 climbers and guides.

By Saturday afternoon, most said everyone in their parties was safe. But Seattle-based Madison Mountaineering said that while it had contact with its group of about a dozen climbers in a camp high above the base camp, it had not heard from staff who stayed behind in the base camp where the avalanche struck.

Madison co-founder Kurt Hunter said the company is keeping its fingers crossed.