Los Angeles, April 26
\"One Tree Hill\" actress Sophia Bush is left heartbroken after her former boyfriend Dan Fredinburg, a Google executive, was tragically killed in a Mount Everest avalanche caused by an earthquake in Nepal.

Fredinburg\'s sister Megan confirmed the news on Instagram on Saturday.

\"I regret to inform all who loved him that during the avalanche of Everest early this morning, our Dan suffered from a major head injury and didn\'t make it,\" she wrote.

Bush and Fredinburg started dating each other in March 2013 before calling it quits in February 2014. In an emotional Instagram post, Bush remembered Fredinburg as \"one-of-a-kindâ€, reports eonline.com.

â€œThere are no adequate words. Today I find myself attempting to pick up the pieces of my heart that have broken into such tiny shards, I\'ll likely never find them all,â€ she wrote.

â€œDan Fredinburg was one-of-a-kind... He was one of my favorite human beings on Earth. #goodbyesweetfriend #savetheice #Nepal,â€ she added.

Fredinburg is among the 18 climbers who have lost their lives in the 7.9-magnitude quake that had its epicentre in Lamjung district, around 75 km northwest of Kathmandu.

Google executive killed in Nepal avalanche

Senior Google executive Dan Fredinburg was among more than a dozen people confirmed killed in an avalanche that swept through Everest base camp in the aftermath of the 7.9 magnitude earthquake in Nepal, media reported on Sunday.

Tom Briggs, marketing director for Jagged Globe, a Sheffield-based climbing and adventure company, confirmed the news, The Guardian reported.

Two other climbers, Paul Greenan, from Dublin, and British-born Richard Brooks, from Sydney, suffered serious injuries.

\"They saw the avalanche coming and were able to make a run for it but the camp was right in the middle of it,\" Briggs was quoted as saying. \"Our thoughts and prayers go out to Danâ€™s family and friends.\"

Fredinburg was head of privacy for Google X, the company\'s highly secretive innovations lab.

Sophia Bush mourns ex-beau\\\'s death in Nepal quake