Police in Costa Rica say an American married couple have died in an accident at a waterfall known as Belen de Nosarita.

They are identified as 48-year-old Darren Mizokami and his 41-year-old wife Kimberly Tean Mizokami.

Costa Rica’s Judicial Investigation Organization said on Thursday that Darren Mizokami was swimming when he began to have trouble staying afloat. Kimberly reportedly dived in to help him.

A third US tourist at the scene went to get help, but when she returned both were dead in the water.

View photos Darren (left) and Kimberley Mizokami (right). Source: Facebook/Darren Mizokami More

View photos Kimberley (left) and Darren Mizokami (right) drowned. Source: Facebook/Kimberley Mizokami More

Their bodies were recovered on Wednesday.

The last post on a Facebook page under Darren Mizokami’s name said the couple had checked into Samara, a town on Costa Rica’s Pacific coast near the falls.

The profile says the couple lived in Casper, Wyoming in the US.

with AP