Transcript for Investigation continues after the mysterious deaths of an American family in Mexico

in this world. Worth remembering. A mystery playing out in Mexico involving the deaths of an entire American family on vacation in that country. Just perplexing. A husband, wife and their two young children from Iowa found dead in their condo. ABC's erielle reshef joins us now with more on this tragic story. Erielle, good morning. Reporter: Good morning, Adrienne and Dan. Right now more questions than answers. The family initially reported missing then hours later that devastating discovery. A spring break vacation turned into a nightmare. This morning, the mysterious deaths of four family members vacationing in Mexico baffling international investigators and bringing heartache to an Iowa town. It's a blow for the community as a whole and for the sharp family in particular. Reporter: The bodies of Kevin sharp his wife Amy and can sterling and Adriana, 12 and 7 found in this complex where they were staying in akumal a few miles away from tulum. Taking off from creston, Iowa for their trip last Thursday. Sterling sent a Snapchat showing his feet by the pool and that was the last time anyone had heard from them. No photos. No social media, no phone calls. The family missing a meeting with a friend, then failing to return home on their scheduled flight. When they didn't arrive last night and we didn't hear anything we started working posting on social media trying to figure out what we could do. Reporter: Stoking fears and a frantic search for answers. We were able to make contact with state department officials. Reporter: By late Friday the shocking news. The U.S. State department saying we are able to confirm of deaths of four U.S. Citizens in akumal. Again, no foul play suspected in this case. Family members tell us that it's their understanding the parents and their kids went to sleep and just never woke up. Police say autopsies will be performed in Mexico and, of course, we should know more after those are completed. So many questions here, really sad. Tragic situation. Just went on spring break. It was supposed to be fun. Thank you very much.

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