Doctors in Panama say two girls born attached at the abdomen who share the same heart are in intensive care and face a situation with a high mortality rate.

Children's Hospital Director Alberto Bissot says the twins were born early Saturday and also share a pancreas and liver. Bissot said Monday that the girls' heart also has structural abnormalities.

Dr. Honorina Espinosa says the girls' situation is "very complex."

This is the second time conjoined twins have been born in Panama in little over a year. In the previous case, twin girls born in August 2009 and were separated but one of them died.