PENITAS, Panama (AP) — Venise Felizor lay on a mattress in a warehouse-turned-shelter on a hot, sticky afternoon with her 20-month-old son, Wesly, in her arms, the boy coughing and wailing after suffering from diarrhea for days.

Originally from Haiti, they recently appeared in this tiny Panamanian village after a six-day hike through the jungle along the Colombian border, where armed robbers stole her husband’s backpack containing the $1,000 that he had saved from two years working in Chile. The thieves raped three women in their group.

“The way was very dangerous,” said Felizor, 26. “I thought my son was going to be lost. I saw scenes of death.”

Panamanian authorities are struggling to contend with a spike in the number of migrants passing through what is known as the Darien Gap, a roadless, lawless region of tropical isthmus that is one of the most dangerous stretches for people heading north from South America, usually toward the United States or Canada.

It’s the biggest migratory crisis Panama has faced since 2015-2016, when about 60,000 people crossed the Darien Gap, an exodus that prompted governments to temporarily close borders in Panama, Costa Rica and Nicaragua. According to the National Border Service of Panama, or Senafront, 7,316 migrants came through the Gap this year as of April 18. Such traffic tends to fall off during the imminent rainy season, but the numbers are still on pace to well exceed the 9,678 who made the passage last year and potentially rival 2015-2016.

In interviews, the migrants say they are fleeing poverty, misery, discrimination, political conflicts, war and extremist violence.

“I think what is happening at the Colombian-Panamanian border is a reflection of what is happening on an international level. … It is a search for hope, for opportunities, for well-being, for a vital minimum that is not being provided by the state where they come from,” said Johanna Fernanda Navas, a researcher on migration and human rights at the Catholic University of Colombia.

Most in the surge in Panama are migrants from Haiti or Cuba, with smaller numbers coming from African nations such as Cameroon and Congo, plus the South Asian countries of India, Bangladesh and Sri Lanka.

Cubans have for years flown to Ecuador to begin their journey, though recently many have begun to opt for abbreviated routes beginning in Panama or Nicaragua. Haitians came to South America years ago following their country’s disastrous 2010 earthquake, more recently deciding to move on when work dried up.

African and Asian migrants tend to arrive by boat or air in Brazil, crossing the Amazon to Peru and turning north through Ecuador to Colombia, where they hire smugglers to shepherd them through the Gap.

“Our jungle is a bad jungle. … That journey is very dangerous (with) unscrupulous people, ‘coyotes,’ who guide them through the jungle and abandon them to fate,” said Jose Samaniego, eastern brigade chief for Senafront in the town of Meteti, one of the last outposts along the Pan-American Highway before it ends on this side of the Darien Gap.

The Gap’s perils are numerous. Tales are common of robberies and sexual assault by marauding bands of armed Colombians and Panamanians, and encounters with the drug trafficking “mules” who walk the same paths as the migrants.

“The jungle aspect of it was so terrible because it was the survival of the fittest, you understand?” said Afolabi Ojo, who fled his home in northern Nigeria after the extremist group Boko Haram killed his entire family. “The environment was so deadly. You can imagine somebody coming from the bush, from the forest.”

Darien’s rivers can rise suddenly and furiously, and in recent weeks at least 10 migrants were reportedly swept to their deaths. Samaniego said the toll could be higher, but there is no way of knowing given the remote and unforgiving nature of the area.

A Congolese man who gave his name as just Kerlo said a person traveling in his small party drowned.

“We could not even bury him because the current took him away,” the man said through tears, pointing at the river.